From a7039dee5f5910aba2b6e4cf90eaff0a634910d5 Mon Sep 17 00:00:00 2001
From: w-bonelli <wbonelli@ucar.edu>
Date: Wed, 10 Apr 2024 21:31:18 -0400
Subject: [PATCH] prt files mostly working, minimal tests with example data
 (can remove and programmatically generate once prt pkg classes are in flopy)

---
 autotest/test_prtfile.py                      |  45 +++++
 examples/data/mf6/prt_data/001/prt001.trk     | Bin 0 -> 21600 bytes
 examples/data/mf6/prt_data/001/prt001.trk.csv | 181 ++++++++++++++++++
 examples/data/mf6/prt_data/001/prt001.trk.hdr |   2 +
 flopy/utils/prtfile.py                        |  64 +++----
 5 files changed, 258 insertions(+), 34 deletions(-)
 create mode 100644 autotest/test_prtfile.py
 create mode 100644 examples/data/mf6/prt_data/001/prt001.trk
 create mode 100644 examples/data/mf6/prt_data/001/prt001.trk.csv
 create mode 100644 examples/data/mf6/prt_data/001/prt001.trk.hdr

diff --git a/autotest/test_prtfile.py b/autotest/test_prtfile.py
new file mode 100644
index 0000000000..39b7850fc4
--- /dev/null
+++ b/autotest/test_prtfile.py
@@ -0,0 +1,45 @@
+from pathlib import Path
+
+import pytest
+
+from autotest.conftest import get_project_root_path
+from flopy.utils.prtfile import PathlineFile
+
+pytestmark = pytest.mark.mf6
+prt_data_path = (
+    get_project_root_path() / "examples" / "data" / "mf6" / "prt_data" / "001"
+)
+
+
+@pytest.mark.parametrize(
+    "path, header_path",
+    [
+        (Path(prt_data_path) / "prt001.trk", None),
+        (
+            Path(prt_data_path) / "prt001.trk",
+            Path(prt_data_path) / "prt001.trk.hdr",
+        ),
+        (Path(prt_data_path) / "prt001.trk.csv", None),
+    ],
+)
+def test_init(path, header_path):
+    file = PathlineFile(path, header_filename=header_path)
+    assert file.fname == path
+    assert file.dtype == PathlineFile.dtypes["full"]
+    if path.suffix == ".csv":
+        assert len(file._data) == len(open(path).readlines()) - 1
+
+
+@pytest.mark.parametrize(
+    "path",
+    [
+        Path(prt_data_path) / "prt001.trk",
+        Path(prt_data_path) / "prt001.trk.csv",
+    ],
+)
+def test_intersect(path):
+    file = PathlineFile(path)
+    nodes = [1, 11, 21]
+    intersection = file.intersect(nodes)
+    assert any(intersection)
+    assert all(d.icell in nodes for d in intersection.itertuples())
diff --git a/examples/data/mf6/prt_data/001/prt001.trk b/examples/data/mf6/prt_data/001/prt001.trk
new file mode 100644
index 0000000000000000000000000000000000000000..593ca093024949adc2187775003b7f2680361a7c
GIT binary patch
literal 21600
zcmcJX2~-qE9>yEw7)5Y^0XYU88WjXo1Vt|CQV~32Kv_|fh#Cy8LgKMOqk@=-28_3u
z1Uvu(@mda1QL>(E6ft-tq6i)V#K>V33=uQ|wu`Rnh0vAv>~8A4p{Kj%^>4m^Rabq~
zRFxJ*QCfr-d$~Oi9{-w>lVHkc+}aZjxcqV^Xj+g9O2ajOlSoW>9VVR5ol(@L#p@qD
z@y%hZ3YMx1mY!y~>onkw(zyoQjk<8xBs*k3+EL4t92l{+d2<2cYGmV@5xA`{etBl#
zPJyGnR(~{6^CRM_W#jfIaMRz(uARQ$5bXFNS#75(L0k*jxPuAY{deY0^FG-ZXkuJH
zw={Z)xGLGWZUk;dcw|G_0b3BEl{t0c*N+faDI0e*fjg*IO7!LT27~zfs_QMgYY|r=
z8#jQ!RnPjuGUlzJh*QsK&kB4})z(8c?gRq&<H8G-#qO>k@y7UHKelK@dMVks(+FH^
z({l&ncX}WW1zg8kB^dL3>Fq`^fm?Te-$H|QZ=ibDcEEf-zV%4Abna{d_s3ehtT}35
zq*noY-K(ZI@bybNH<ZA&*gWU^s6PPWD#3(dkqb(`!q1a*?i>R5#@)x?#eFmuaaG`)
zOQYih1KfT{=guW??Z-Wh8280E#I*p1B@3;zjB$G@ojZ@f-P+<8ulv3q;;O+U_3yK3
z8{9ug=e|$irdiiMw)z8eHQ-KG{?Eq~aDOPB8%E%s2)J-3VD@;Vmj=lzuB=Rq#Qnc?
z?tH}6Wsg13dwA$Bt~Pt`j@|~o7fPJJDrCaj6Aie}bkghkH}*<{8Tcr~?Z_T%o;%ZQ
z#093g4W=8Yosy4B@>hMArT6T8_bGGT$2#p~Y#HKeWYbIXS5?*Pbwdg$pc^@9&on>W
zP6_%eQE~3i6<DXThL<)5y{(n%W(2eb4qbcTWew6R=&wX^N&d<?B6HbK1I$re>zQW5
zd%ic$3HmEhTt|Z5^*0I*4IX3xW}eZpbbf{VKl!*L2;42MM=nLX(;#48p;P)>FHxKY
zeVr)1z69=DzK4$g=I98*Z#>i3__QLfpsy3fCHbpIXR7l`PdTCTr9iQNy~)XJJ#;R;
z-Iz$wt6y?*-Go!FU|L0uLdEka*|;Qsb+s;JMs}<l;wZq#OBt0dUO3*;_5OpPH#ILS
zf7q%~h^qwORSp|eGYQu(>D=iAuFFpSG@VUeh^qoj{=h{qUgGCTIyZ#C&03_JVPoJ8
zcDC8a{Bj0AxAJl461ZzW^}N-3-3RHl0K=bKPcCb~?WJ_R^9bCam$e4#qOpHggF|j7
z%!?V^KS<}kPvAzmjx5N`Vvt@9@VVkuws$4&52bTS{_5>ZON-Ze0>q_3<kiIk6Pt1W
zFP%&BSKY;h9u9jR80wB52cF}U{`&c7H@92N?bzq+I2H}K>z(wvy@|gP;&x=KgU(Ni
zkNttkSuvv_@56hjUyzSW@>hwJ!{zEl&zan%hga;)`vq|Y{go)aB!Bfx|LknNy|^E!
zXCiDYsn`jE{z??roGY+SWeqR6M0_?-J53A3OkwmMeuLX7`M4SaH)Pe#DO0a1LF<PH
zmyR-NLU9)Kb)xi={8d%uz2d0dRv_e}UEz%vEr^TTY3cQu<geZfI@@A%-Ugs>fTOp)
zlRm99LFdxBBMEUH6FP5t+f6%gsQ(Nj?`=I0PteziiZcpemwMHA{P-i+;|3$10?>gb
zN#`c_l1(qVQ5Wu?&vY-94{!!mPu!QK@H|03DN64oic1~aOn7Cu&G$}wp1J@oR|%Gt
z957DaisLQ4d?#}^?xHvF^|LGM=evQB=|v@36}Ud(c0@Xt<gZS~7iI?z9f9<!!0QLo
z(oGuh^CX=cLeTq3v~%O0{qBfs0Rj>iR8Cgn_Cq>%27&w2(bdhbQ}MW{8aO)ohd)lk
z?WJ_?Oagb-hmDi^Uhn`74S$+s1mJdAKJNPj?rd+rs?1VP6lV=^H2J9ci{rRIl&+WL
zui|#TxTL=i`*s?f9@6xUQv~k+rE^LCs=K&4Y<xSm74W@KGME>Vo|II|D2~zBii&8!
zeWsJ%5pUwJgt#5qs|O~hH|5-7C^KgM^y!aLGcF&O<gdKuY%y)w{ww0uGdc#^=Dt$}
z{go)ay}7`3iaEUGoc}zuf5r=@BFn#~CE*3)%f}`8tCVp$D_Xbcfr^0}ck3DbiMaSV
zmR`OZf?m}Q$Kvyih5%)Qh($v;Pc*PX=hC^h1nxCU@2|9dRp7p_CVQw(55yDnb)w4G
ziNGD}WmvstUq8fC0PS1euP00u^mU@R&IE2<s8iz7oc<v6Y*X#EP1tA1$8{%gAFk5<
z($df#B-Xgja9Q66=@#^LqV%F0c6p8rdxvCJth48N@jE9PIrDt!^=b@3@2LRgv<Ii~
z@31ORQLr_CHy>~5+_40%QTj^LZ^sM+TY{f#cIN97E@$c7w+P(eGUJu6JX}$nEr3JA
zu3{_xd6LeZLg4x-4_|nY;06Y~SLhhZw-*%p9@4oae|62Mf8d(sBM?Uob{MaXUBtJS
z(zzsmb$79I7}XE^Newu@Aal;fjktf1&YeYwv#FM;_sw_RLG|`y@qv8*C+O=$J-;M>
z<@9du#a*wkUK(V7>SlAA@BgLiCHbrF;=<n{p|622nDCK1`|ICw)c@K6E~k^;k#FL!
zgt#5qm4oWGI-bJgk+@uG*|^%AfKJ-srS9gE{FQ^Xo^dJFhT=<sr8*lI^`Zp*m8duy
z67-gv`S(oIYGZ=d9k@7#!tIoN+`a^E`t*b^BW4)`E?WUoR-3IHObPlrQF<*1+|VPd
ze4eq~)EUVYkreKS<m1u=Zfr=dQP1COkX|LQQs_^lDM4Q+O0OM(`)<mikK$Oao6l`W
zdkXs-`M5&}T;1F;iyu1;LV8u;@~z++8%ogEiPAfiz-`>t!dN>G0y#H92cCRf4+8g`
zx~|GIbO_RG0q!*EEYtAumflW!61Yjnj{O<Qa-DXRf1u{;6E0`z+;IeMTZVthzitml
zdexxM-g$){{PQH8>qp?`C{2HkW4S3#{;6hsdx4*0>D;#o-1EO14ms(K{gnp%SbM>j
z{a*^{m(C3&a5vpiesGTE>J3dT)#LjE`M4y1RabgW{p|cmq>lz`dPiJ$r*J<kUGF;t
zy|0EeIM=h>y;mOQX;U=f%f}`8tM20Ju{xoz!QKWR*-M=g_xs=@=5X6Xc80qh;4(YK
z+5JuYl@PZhyR@fYT>JP{JE)#Xsr>xkhY!=TakV)CowUPCMT`Hr5RPA^ulgXq&vHE8
zO#_%mQPTC2{MFHz%a#W0_!Y;Yz@B`^uP<iV0`6Qom*lT%GpwgKvg21AM*&_9iLo8G
zMk5>7h`Vu@IKNKLecH&5Uu}zBJYiFf0piKWCHbqm5q&&<AC3E4CHQ7tl22m{9#@hc
zXG?<KZF#oJ40im=>FIX*N|q_oE9mP)Jx3&el~}XQE0i6-;=Yy&JUV{!{(*dJbS_=*
z0Pe<J%6B;MsOiIwUvb$MptQ9$_mk0rzD|_hfduX!vweSTX2-9R?;G4*#q;Fj4kK_6
zCpAYkvg21bd)vP}&&L<nGwE?A`KyY^(NU@F_!alH)L=^3_gky@`X!y~MbP`H<Hk)r
zJYB)WoNUKd{`nE~b)w3b<gYeNjC%#gueh(J0sRV=8He%hhjhK;33@$MdVw3*@hg9I
zWQIH6J_`CeQF=-KYJ8Mwn1UU@dZEbenalSFg8oVrm*lVhGukZoHamXBg@XpGo;fVo
z7lr#n>2W6ctBYqQp5DWbUoD?MXIlo}-wXOHQF=-Ks=K)QYyhFJ!QKWRxw!uSZ<e-V
zUU>K~jMG{rJHy=$a5<ggJnBvSl@PZhyFZ$L#c}GHaeh$~b_|e@OY&EH(EKZ;96X-6
z-r>tc8gS>*_4YtFhFUx7El2aOtS((^(^{;Lcr-dn=aT%DH=2LNejPR`z}w~?OkACy
zuM<_iB!Be|nt#P{mB8o4RpWdc`M7<!8+WSP@X}*6|BB02f$g8))BARepsy39S4rU7
zqxn}pj^Br`u`vVO$K>N$5xBl+{uP&P0qm9(e^NP0&`*leYfa!b`*HKH!tO42)09~O
z?qh;}QWTfuubR>PE6mg0RORo&^QAvWg9v(QH2=y+<=o`zf#WOa>qO~wA#j7x{3|Y7
z1HL}&<}kG%u3ysi4kvIAqxn}p=}|`>@XwE+pA@Cno4{R&=3jkmcx>HEzP%9ib)vW=
ze{~VfzdGeLD)=JbJ_`CPQCyP03Pkg-xNy**w_304#1h;;NH5<YLY#xp{Hy!@R)Uj!
z|0n3{MCm2@s}*Se)pq~#{onHay`aAm#U=Tx?&2!g_;&2;JNEe~^zDafElvB9l4{WW
zc00i3bt+$vH}O|O+>Y#U#pe^?`azCU&zu>xfuh#R$0hlztgIwmxPFl1Qovxz?Qz=9
z@^MN2%E)7#4qQLTaTTEQt2HIx{XnC0>2cQKZrrJ?;iXe4lPS1<kjqvA{k)unU2|!4
zE}g5(-M9;Pm%-XyaQ&da$@Lp90FUR$$0hkI&Br6Zh3f~oucZS1_dsk}xuCBTRi8=z
zs#2%&B3wVnaV@~5GYK&f?(%Vsxf^$hbGouT7p@=Vvem#~a@Cw@4?$liO0NlldnDEV
zC%AqvZ1(cc1{}n`N<OZdz)dh&`x#t6$YpE5OwUjBm-Bq-_1T8NJ?{L?e7JtlV`FAO
zDj#30TRPXCz)fg+eHpGF)ZF%YxSy|2xPD9LlKhoLac~w~Kj?f=eZsZ^*JD9{C8}PL
z{MCkE^AE!HgIqXh;9eiS-Eu5$KcwsRA;j4!<-*T!{a{*_*6d2YeH8R{qV)O`xPO@b
z%L1++G&o&yPP>Q(+{XlcohUBJUulBQ+=A-|3xj)`xbgiT?w_Q`ndGkq6rU)A>j%w0
zsL!_H`+GruB}y;JUv(F^CtF}z=mpCTz86aG=_>zQRP>Yyp=^taitGUQnND%`d=q~q
z#O=sFXrkS>n%)13<J2=dd;GRUT_7J<8;OL>j@+7|GxOm7S121ie-fs?k|rOQ<gaY*
z=GMdguQ;v(jGDDMw`I9}T#~;kU{*hc`(JTfB}lxvs46r-J}${$jVSaFhWlS}Tou^c
zI^Jb#ANjcO_h*>2(5wA~{Zl{Z=l1=txN{3IDc~RBD=*W4JC|Oc;kYbJf8{RgVG;xP
zziQ89=ZzSK)u}-Ujn1WW;r}Zzb>aGX<wdjmU(Nq8et{u{$5m(mKl_*8yG1>}B!BhK
zxmO;+{jb_F?7We^)wMGlqH#YgU9Ty3<1Tu8ez!Xc?tfLBx#Us{&lB`@qV$sdm6@5-
zBDnt*_qAxy*V3+V3LkIjdixRd7M{Hx4fnr#r+VL40epQD^mU^2IuN+3rsGH8{#Si}
zYmWPje|`jgohYs=fqQkV_kOtlmETSW(=@)l5cGATxFmmNn>i*J?ti6di*8)Ow~vDU
zN)(smuM!p{FNXVH+1i-YnXka@qoBVM#U=Tx-RqfaaQ~|^58A0T4Rdk-B)vY9{8jc*
b^RsaOt1UY{?hNAldqICCN-xP@$;JI27uj@e

literal 0
HcmV?d00001

diff --git a/examples/data/mf6/prt_data/001/prt001.trk.csv b/examples/data/mf6/prt_data/001/prt001.trk.csv
new file mode 100644
index 0000000000..0b846c480f
--- /dev/null
+++ b/examples/data/mf6/prt_data/001/prt001.trk.csv
@@ -0,0 +1,181 @@
+kper,kstp,imdl,iprp,irpt,ilay,icell,izone,istatus,ireason,trelease,t,x,y,z,name
+1,1,1,1,1,1,1,0,1,0,.000000000000000,.000000000000000,.1000000000000000,9.100000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,1,0,1,1,.000000000000000,.6345986517174945E-01,.1111111111111111,9.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,11,0,1,1,.000000000000000,.8304308339182425,.1840201091047777,8.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,21,0,1,1,.000000000000000,2.026389948294649,.2675956324493809,7.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,31,0,1,1,.000000000000000,3.704265435673124,.3606040744154423,6.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,41,0,1,1,.000000000000000,5.928937232170627,.4696105785642022,5.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,51,0,1,1,.000000000000000,8.827842277987040,.6123549075346494,4.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,61,0,1,1,.000000000000000,12.68120183411981,.8315419220952132,3.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,71,0,1,1,.000000000000000,15.14939193559672,1.000000000000000,2.499948317631721,.5000000000000000,PRP000000001
+1,1,1,1,1,1,72,0,1,1,.000000000000000,18.21418587905050,1.255970885130385,2.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,82,0,1,1,.000000000000000,24.57630394377621,2.000000000000000,1.255876098210262,.5000000000000000,PRP000000001
+1,1,1,1,1,1,83,0,1,1,.000000000000000,27.64079914213009,2.499702722804964,1.000000000000000,.5000000000000000,PRP000000001
+1,1,1,1,1,1,93,0,1,1,.000000000000000,30.11083496453177,3.000000000000000,.8314848596408819,.5000000000000000,PRP000000001
+1,1,1,1,1,1,94,0,1,1,.000000000000000,33.96453146615585,4.000000000000000,.6122853298161113,.5000000000000000,PRP000000001
+1,1,1,1,1,1,95,0,1,1,.000000000000000,36.86342560027116,5.000000000000000,.4694741172286391,.5000000000000000,PRP000000001
+1,1,1,1,1,1,96,0,1,1,.000000000000000,39.08799504314657,6.000000000000000,.3604128606742599,.5000000000000000,PRP000000001
+1,1,1,1,1,1,97,0,1,1,.000000000000000,40.76579383248019,7.000000000000000,.2674032132676457,.5000000000000000,PRP000000001
+1,1,1,1,1,1,98,0,1,1,.000000000000000,41.96175836497356,8.000000000000000,.1838899700554665,.5000000000000000,PRP000000001
+1,1,1,1,1,1,99,0,1,1,.000000000000000,42.72875484883790,9.000000000000000,.1110317990610085,.5000000000000000,PRP000000001
+1,1,1,1,1,1,100,0,5,3,.000000000000000,42.72875484883790,9.000000000000000,.1110317990610085,.5000000000000000,PRP000000001
+1,1,1,1,2,1,1,0,1,0,.000000000000000,.000000000000000,.2000000000000000,9.199999999999999,.5000000000000000,PRP000000002
+1,1,1,1,2,1,1,0,1,1,.000000000000000,.1344019587597114,.2499999999999998,9.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,11,0,1,1,.000000000000000,.9013729275062045,.4140452454857496,8.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,21,0,1,1,.000000000000000,2.097332041882611,.6020901730111069,7.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,31,0,1,1,.000000000000000,3.775207529261086,.8113591674347448,6.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,41,0,1,1,.000000000000000,5.535959045252451,1.000000000000000,5.187314016456632,.5000000000000000,PRP000000002
+1,1,1,1,2,1,42,0,1,1,.000000000000000,6.037268307514641,1.060833070496150,5.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,52,0,1,1,.000000000000000,9.106420685909395,1.393711253205838,4.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,62,0,1,1,.000000000000000,13.08389057699164,1.889676216739610,3.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,72,0,1,1,.000000000000000,13.86103602973066,2.000000000000000,2.835798404653227,.5000000000000000,PRP000000002
+1,1,1,1,2,1,73,0,1,1,.000000000000000,18.71985648382454,2.835487432134109,2.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,83,0,1,1,.000000000000000,19.49876924392792,3.000000000000000,1.889402280179934,.5000000000000000,PRP000000002
+1,1,1,1,2,1,84,0,1,1,.000000000000000,23.47729073062385,4.000000000000000,1.393288754623582,.5000000000000000,PRP000000002
+1,1,1,1,2,1,85,0,1,1,.000000000000000,26.54694563326774,5.000000000000000,1.060289778364293,.5000000000000000,PRP000000002
+1,1,1,1,2,1,86,0,1,1,.000000000000000,27.04342109091038,5.185449557844453,1.000000000000000,.5000000000000000,PRP000000002
+1,1,1,1,2,1,96,0,1,1,.000000000000000,28.80857582239105,6.000000000000000,.8107730357146236,.5000000000000000,PRP000000002
+1,1,1,1,2,1,97,0,1,1,.000000000000000,30.48637461172467,7.000000000000000,.6015415614616489,.5000000000000000,PRP000000002
+1,1,1,1,2,1,98,0,1,1,.000000000000000,31.68233914421804,8.000000000000000,.4136728888653385,.5000000000000000,PRP000000002
+1,1,1,1,2,1,99,0,1,1,.000000000000000,32.44933562808238,9.000000000000000,.2497735197826673,.5000000000000000,PRP000000002
+1,1,1,1,2,1,100,0,5,3,.000000000000000,32.44933562808238,9.000000000000000,.2497735197826673,.5000000000000000,PRP000000002
+1,1,1,1,3,1,1,0,1,0,.000000000000000,.000000000000000,.3000000100000000,9.300000010000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,1,0,1,1,.000000000000000,.2148294796940043,.4285714489795920,9.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,11,0,1,1,.000000000000000,.9818004484404974,.7097918832037549,8.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,21,0,1,1,.000000000000000,2.076672298776422,1.000000000000000,7.070796968014615,.5000000000000000,PRP000000003
+1,1,1,1,3,1,22,0,1,1,.000000000000000,2.203617375414431,1.040006660846159,7.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,32,0,1,1,.000000000000000,4.197575775002937,1.441947406746180,6.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,42,0,1,1,.000000000000000,6.651816678925318,1.871780191137267,5.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,52,0,1,1,.000000000000000,7.437614407292212,2.000000000000000,4.721197504307768,.5000000000000000,PRP000000003
+1,1,1,1,3,1,53,0,1,1,.000000000000000,9.908198040138020,2.445425140413097,4.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,63,0,1,1,.000000000000000,12.75938925953464,3.000000000000000,3.286986537810564,.5000000000000000,PRP000000003
+1,1,1,1,3,1,64,0,1,1,.000000000000000,14.07202735612326,3.286925213146775,3.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,74,0,1,1,.000000000000000,16.92425797975483,4.000000000000000,2.445118081984156,.5000000000000000,PRP000000003
+1,1,1,1,3,1,75,0,1,1,.000000000000000,19.39266639551562,4.720393535467641,2.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,85,0,1,1,.000000000000000,20.18090342207207,5.000000000000000,1.871355668916179,.5000000000000000,PRP000000003
+1,1,1,1,3,1,86,0,1,1,.000000000000000,22.63520742498483,6.000000000000000,1.441478618996614,.5000000000000000,PRP000000003
+1,1,1,1,3,1,87,0,1,1,.000000000000000,24.62882950801743,7.000000000000000,1.039525413044098,.5000000000000000,PRP000000003
+1,1,1,1,3,1,88,0,1,1,.000000000000000,24.75426166980228,7.069965645493071,1.000000000000000,.5000000000000000,PRP000000003
+1,1,1,1,3,1,98,0,1,1,.000000000000000,25.85030962625330,8.000000000000000,.7095393993518588,.5000000000000000,PRP000000003
+1,1,1,1,3,1,99,0,1,1,.000000000000000,26.61730611011764,9.000000000000000,.4284161664224617,.5000000000000000,PRP000000003
+1,1,1,1,3,1,100,0,5,3,.000000000000000,26.61730611011764,9.000000000000000,.4284161664224617,.5000000000000000,PRP000000003
+1,1,1,1,4,1,1,0,1,0,.000000000000000,.000000000000000,.4000000100000000,9.400000009999999,.5000000000000000,PRP000000004
+1,1,1,1,4,1,1,0,1,1,.000000000000000,.3076762301867217,.6666666944444444,9.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,11,0,1,1,.000000000000000,.9240708715396757,1.000000000000000,8.158676803349870,.5000000000000000,PRP000000004
+1,1,1,1,4,1,12,0,1,1,.000000000000000,1.165313120694530,1.158689414248265,8.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,22,0,1,1,.000000000000000,2.819821295801787,1.753424270226212,7.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,32,0,1,1,.000000000000000,3.744508416699555,2.000000000000000,6.511022764165868,.5000000000000000,PRP000000004
+1,1,1,1,4,1,33,0,1,1,.000000000000000,5.060556757909990,2.377042167827183,6.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,43,0,1,1,.000000000000000,7.654780984694812,3.000000000000000,5.079379949475653,.5000000000000000,PRP000000004
+1,1,1,1,4,1,44,0,1,1,.000000000000000,7.922308268687384,3.068752132115875,5.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,54,0,1,1,.000000000000000,11.52558583084959,3.940033608666633,4.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,64,0,1,1,.000000000000000,11.75758115458850,4.000000000000000,3.940025436039324,.5000000000000000,PRP000000004
+1,1,1,1,4,1,65,0,1,1,.000000000000000,15.36106354187710,5.000000000000000,3.068656396580068,.5000000000000000,PRP000000004
+1,1,1,1,4,1,66,0,1,1,.000000000000000,15.62822018489717,5.079271523708384,3.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,76,0,1,1,.000000000000000,18.22255665479527,6.000000000000000,2.377004299951427,.5000000000000000,PRP000000004
+1,1,1,1,4,1,77,0,1,1,.000000000000000,19.53853998567526,6.511101406612429,2.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,87,0,1,1,.000000000000000,20.46286482342002,7.000000000000000,1.753519533203051,.5000000000000000,PRP000000004
+1,1,1,1,4,1,88,0,1,1,.000000000000000,22.11719341120610,8.000000000000000,1.158823369731619,.5000000000000000,PRP000000004
+1,1,1,1,4,1,89,0,1,1,.000000000000000,22.35864609922380,8.158809921188507,1.000000000000000,.5000000000000000,PRP000000004
+1,1,1,1,4,1,99,0,1,1,.000000000000000,22.97494147400282,9.000000000000000,.6667156763397112,.5000000000000000,PRP000000004
+1,1,1,1,4,1,100,0,5,3,.000000000000000,22.97494147400282,9.000000000000000,.6667156763397112,.5000000000000000,PRP000000004
+1,1,1,1,5,1,1,0,1,0,.000000000000000,.000000000000000,.5000000000000000,9.500000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,1,0,1,1,.000000000000000,.4174906163649280,1.000000000000000,9.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,2,0,1,1,.000000000000000,.4174906163649280,1.000000000000000,9.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,12,0,1,1,.000000000000000,1.937707010745450,2.000000000000000,8.000079469058820,.5000000000000000,PRP000000005
+1,1,1,1,5,1,13,0,1,1,.000000000000000,1.937897716737432,2.000125435399617,8.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,23,0,1,1,.000000000000000,4.337324478275523,3.000000000000000,7.000158206878864,.5000000000000000,PRP000000005
+1,1,1,1,5,1,24,0,1,1,.000000000000000,4.337822861659189,3.000207674524930,7.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,34,0,1,1,.000000000000000,7.487339238772278,4.000000000000000,6.000130787901094,.5000000000000000,PRP000000005
+1,1,1,1,5,1,35,0,1,1,.000000000000000,7.487809876540122,4.000149411454049,6.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,45,0,1,1,.000000000000000,11.08573482205339,5.000000000000000,5.000114103070649,.5000000000000000,PRP000000005
+1,1,1,1,5,1,46,0,1,1,.000000000000000,11.08614540071765,5.000114101964002,5.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,56,0,1,1,.000000000000000,14.68403544778846,6.000000000000000,4.000123769334058,.5000000000000000,PRP000000005
+1,1,1,1,5,1,57,0,1,1,.000000000000000,14.68442525571463,6.000108329612469,4.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,67,0,1,1,.000000000000000,17.83379884218993,7.000000000000000,3.000108311931065,.5000000000000000,PRP000000005
+1,1,1,1,5,1,68,0,1,1,.000000000000000,17.83405870643099,7.000082496912824,3.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,78,0,1,1,.000000000000000,20.23326379385776,8.000000000000000,2.000082483570943,.5000000000000000,PRP000000005
+1,1,1,1,5,1,79,0,1,1,.000000000000000,20.23338920270048,8.000052262118526,2.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,89,0,1,1,.000000000000000,21.75363330539578,9.000000000000000,1.000052267380652,.5000000000000000,PRP000000005
+1,1,1,1,5,1,90,0,1,1,.000000000000000,21.75366478813337,9.000020708747167,1.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,5,1,100,0,5,3,.000000000000000,21.75366478813337,9.000020708747167,1.000000000000000,.5000000000000000,PRP000000005
+1,1,1,1,6,1,1,0,1,0,.000000000000000,.000000000000000,.6000000200000000,9.600000020000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,1,0,1,1,.000000000000000,.3076762000711404,1.000000000000000,9.333333388888887,.5000000000000000,PRP000000006
+1,1,1,1,6,1,2,0,1,1,.000000000000000,.9240710314511431,1.841323406980941,9.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,12,0,1,1,.000000000000000,1.165293789563162,2.000000000000000,8.841336016860446,.5000000000000000,PRP000000006
+1,1,1,1,6,1,13,0,1,1,.000000000000000,2.819801964670423,3.000000000000000,8.246605917483054,.5000000000000000,PRP000000006
+1,1,1,1,6,1,14,0,1,1,.000000000000000,3.744607781601528,3.489037099745424,8.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,24,0,1,1,.000000000000000,5.060505748680252,4.000000000000000,7.623002001638187,.5000000000000000,PRP000000006
+1,1,1,1,6,1,25,0,1,1,.000000000000000,7.654926540429770,4.920685329586415,7.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,35,0,1,1,.000000000000000,7.922234454245331,5.000000000000000,6.931304407347144,.5000000000000000,PRP000000006
+1,1,1,1,6,1,36,0,1,1,.000000000000000,11.52551201640753,6.000000000000000,6.060030743421259,.5000000000000000,PRP000000006
+1,1,1,1,6,1,37,0,1,1,.000000000000000,11.75775770078962,6.060038924907667,6.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,47,0,1,1,.000000000000000,15.36124008807822,6.931400152333666,5.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,57,0,1,1,.000000000000000,15.62817732214757,7.000000000000000,4.920793768273893,.5000000000000000,PRP000000006
+1,1,1,1,6,1,58,0,1,1,.000000000000000,18.22271040318674,7.623039881680662,4.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,68,0,1,1,.000000000000000,19.53854331473988,8.000000000000000,3.488958488764992,.5000000000000000,PRP000000006
+1,1,1,1,6,1,69,0,1,1,.000000000000000,20.46298688791669,8.246510667273593,3.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,79,0,1,1,.000000000000000,22.11731547570277,8.841202071173459,2.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,89,0,1,1,.000000000000000,22.35872948664267,9.000000000000000,1.841215517967525,.5000000000000000,PRP000000006
+1,1,1,1,6,1,90,0,1,1,.000000000000000,22.97504784393619,9.333294402737220,1.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,6,1,100,0,5,3,.000000000000000,22.97504784393619,9.333294402737220,1.000000000000000,.5000000000000000,PRP000000006
+1,1,1,1,7,1,1,0,1,0,.000000000000000,.000000000000000,.6999999900000000,9.699999990000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,1,0,1,1,.000000000000000,.2148294796940044,1.000000000000000,9.571428551020409,.5000000000000000,PRP000000007
+1,1,1,1,7,1,2,0,1,1,.000000000000000,.9818004484404983,2.000000000000000,9.290208116796245,.5000000000000000,PRP000000007
+1,1,1,1,7,1,3,0,1,1,.000000000000000,2.076672298776415,2.929203031985378,9.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,13,0,1,1,.000000000000000,2.203617375414436,3.000000000000000,8.959993339153836,.5000000000000000,PRP000000007
+1,1,1,1,7,1,14,0,1,1,.000000000000000,4.197575775002941,4.000000000000000,8.558052593253812,.5000000000000000,PRP000000007
+1,1,1,1,7,1,15,0,1,1,.000000000000000,6.651816678925319,5.000000000000000,8.128219808862726,.5000000000000000,PRP000000007
+1,1,1,1,7,1,16,0,1,1,.000000000000000,7.437614407292165,5.278802495692215,8.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,26,0,1,1,.000000000000000,9.908198040138014,6.000000000000000,7.554574859586896,.5000000000000000,PRP000000007
+1,1,1,1,7,1,27,0,1,1,.000000000000000,12.75938925953459,6.713013462189426,7.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,37,0,1,1,.000000000000000,14.07202735612326,7.000000000000000,6.713074786853214,.5000000000000000,PRP000000007
+1,1,1,1,7,1,38,0,1,1,.000000000000000,16.92425797975478,7.554881918015834,6.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,48,0,1,1,.000000000000000,19.39266639551562,8.000000000000000,5.279606464532343,.5000000000000000,PRP000000007
+1,1,1,1,7,1,49,0,1,1,.000000000000000,20.18090342207203,8.128644331083812,5.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,59,0,1,1,.000000000000000,22.63520742498477,8.558521381003381,4.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,69,0,1,1,.000000000000000,24.62882950801737,8.960474586955897,3.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,79,0,1,1,.000000000000000,24.75426166980224,9.000000000000000,2.930034354506921,.5000000000000000,PRP000000007
+1,1,1,1,7,1,80,0,1,1,.000000000000000,25.85030962625325,9.290460600648139,2.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,90,0,1,1,.000000000000000,26.61730611011759,9.571583833577536,1.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,7,1,100,0,5,3,.000000000000000,26.61730611011759,9.571583833577536,1.000000000000000,.5000000000000000,PRP000000007
+1,1,1,1,8,1,1,0,1,0,.000000000000000,.000000000000000,.8000000100000000,9.800000010000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,1,0,1,1,.000000000000000,.1344019512308165,1.000000000000000,9.750000015625000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,2,0,1,1,.000000000000000,.9013729199773104,2.000000000000000,9.585954780392077,.5000000000000000,PRP000000008
+1,1,1,1,8,1,3,0,1,1,.000000000000000,2.097332034353719,3.000000000000000,9.397909864619525,.5000000000000000,PRP000000008
+1,1,1,1,8,1,4,0,1,1,.000000000000000,3.775207521732195,4.000000000000000,9.188640883275196,.5000000000000000,PRP000000008
+1,1,1,1,8,1,5,0,1,1,.000000000000000,5.535959564152013,4.812686202004050,9.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,15,0,1,1,.000000000000000,6.037268254292059,5.000000000000000,8.939167000453050,.5000000000000000,PRP000000008
+1,1,1,1,8,1,16,0,1,1,.000000000000000,9.106420632686824,6.000000000000000,8.606288836540338,.5000000000000000,PRP000000008
+1,1,1,1,8,1,17,0,1,1,.000000000000000,13.08389052376908,7.000000000000000,8.110323902719321,.5000000000000000,PRP000000008
+1,1,1,1,8,1,18,0,1,1,.000000000000000,13.86103684171424,7.164201773142255,8.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,28,0,1,1,.000000000000000,18.71985641123550,8.000000000000000,7.164512745583430,.5000000000000000,PRP000000008
+1,1,1,1,8,1,29,0,1,1,.000000000000000,19.49877003654247,8.110597839292595,7.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,39,0,1,1,.000000000000000,23.47729152323840,8.606711335111470,6.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,49,0,1,1,.000000000000000,26.54694642588228,8.939710292575988,5.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,59,0,1,1,.000000000000000,27.04342131175283,9.000000000000000,4.814550660372381,.5000000000000000,PRP000000008
+1,1,1,1,8,1,60,0,1,1,.000000000000000,28.80857656933874,9.189227014975872,4.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,70,0,1,1,.000000000000000,30.48637535867236,9.398458476147445,3.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,80,0,1,1,.000000000000000,31.68233989116573,9.586327136997982,2.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,90,0,1,1,.000000000000000,32.44933637503007,9.750226495833470,1.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,8,1,100,0,5,3,.000000000000000,32.44933637503007,9.750226495833470,1.000000000000000,.5000000000000000,PRP000000008
+1,1,1,1,9,1,1,0,1,0,.000000000000000,.000000000000000,.8999999800000000,9.899999980000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,1,0,1,1,.000000000000000,.6345987855645296E-01,1.000000000000000,9.888888864197531,.5000000000000000,PRP000000009
+1,1,1,1,9,1,2,0,1,1,.000000000000000,.8304308473029468,2.000000000000000,9.815979850001865,.5000000000000000,PRP000000009
+1,1,1,1,9,1,3,0,1,1,.000000000000000,2.026389961679355,3.000000000000000,9.732404308084922,.5000000000000000,PRP000000009
+1,1,1,1,9,1,4,0,1,1,.000000000000000,3.704265449057832,4.000000000000000,9.639395845450316,.5000000000000000,PRP000000009
+1,1,1,1,9,1,5,0,1,1,.000000000000000,5.928937245555336,5.000000000000000,9.530389317077885,.5000000000000000,PRP000000009
+1,1,1,1,9,1,6,0,1,1,.000000000000000,8.827842291371752,6.000000000000000,9.387644956386470,.5000000000000000,PRP000000009
+1,1,1,1,9,1,7,0,1,1,.000000000000000,12.68120184750453,7.000000000000000,9.168457893117671,.5000000000000000,PRP000000009
+1,1,1,1,9,1,8,0,1,1,.000000000000000,15.14938897572776,7.500051133825171,9.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,18,0,1,1,.000000000000000,18.21418594018942,8.000000000000000,8.744028834033367,.5000000000000000,PRP000000009
+1,1,1,1,9,1,19,0,1,1,.000000000000000,24.57630095531389,8.744123620991481,8.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,29,0,1,1,.000000000000000,27.64079917480293,9.000000000000000,7.500296728865826,.5000000000000000,PRP000000009
+1,1,1,1,9,1,30,0,1,1,.000000000000000,30.11083202407352,9.168514955661681,7.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,40,0,1,1,.000000000000000,33.96452852569760,9.387714534177162,6.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,50,0,1,1,.000000000000000,36.86342265981291,9.530525778487238,5.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,60,0,1,1,.000000000000000,39.08799210268831,9.639587059267356,4.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,70,0,1,1,.000000000000000,40.76579089202193,9.732596727334171,3.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,80,0,1,1,.000000000000000,41.96175542451530,9.816109989097118,2.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,90,0,1,1,.000000000000000,42.72875190837964,9.888968176275537,1.000000000000000,.5000000000000000,PRP000000009
+1,1,1,1,9,1,100,0,5,3,.000000000000000,42.72875190837964,9.888968176275537,1.000000000000000,.5000000000000000,PRP000000009
diff --git a/examples/data/mf6/prt_data/001/prt001.trk.hdr b/examples/data/mf6/prt_data/001/prt001.trk.hdr
new file mode 100644
index 0000000000..c5fb8481e9
--- /dev/null
+++ b/examples/data/mf6/prt_data/001/prt001.trk.hdr
@@ -0,0 +1,2 @@
+kper,kstp,imdl,iprp,irpt,ilay,icell,izone,istatus,ireason,trelease,t,x,y,z,name
+<i4,<i4,<i4,<i4,<i4,<i4,<i4,<i4,<i4,<i4,<f8,<f8,<f8,<f8,<f8,|S40
diff --git a/flopy/utils/prtfile.py b/flopy/utils/prtfile.py
index 2fdabcdc19..6df2419741 100644
--- a/flopy/utils/prtfile.py
+++ b/flopy/utils/prtfile.py
@@ -54,19 +54,25 @@ class PathlineFile(ParticleTrackFile):
                 ("dest", np.str_),  # destination name, for convenience
                 ("istatus", np.int32),
                 ("ireason", np.int32),
-                ("trelease", np.int32),
-                ("t", np.int32),
-                ("t0", np.int32),  # release time, for convenience
-                ("tt", np.int32),  # termination time, convenience
-                ("time", np.int32),  # conform to canonical dtype
-                ("x", np.int32),
-                ("y", np.int32),
-                ("z", np.int32),
+                ("trelease", np.float32),
+                ("t", np.float32),
+                ("t0", np.float32),  # release time, for convenience
+                ("tt", np.float32),  # termination time, convenience
+                ("time", np.float32),  # conform to canonical dtype
+                ("x", np.float32),
+                ("y", np.float32),
+                ("z", np.float32),
                 ("particleid", np.int32),  # conform to canonical dtype
                 ("name", np.str_),
             ]
         ),
     }
+    """
+    Base (directly from MODFLOW 6 PRT) and full (extended by this class) dtypes for PRT.
+    The extended dtype complies with the canonical `flopy.utils.particletrackfile.dtype`
+    and provides a few other columns for convenience, including release and termination 
+    time and destination zone number/name.
+    """
 
     def __init__(
         self,
@@ -105,7 +111,7 @@ def _load(
             data = pd.read_csv(self.fname, dtype=dtype)
         except UnicodeDecodeError:
             try:
-                data = np.fromfile(self.fname, dtype=dtype)
+                data = pd.DataFrame(np.fromfile(self.fname, dtype=dtype))
             except:
                 raise ValueError("Unreadable file, expected binary or CSV")
 
@@ -113,7 +119,8 @@ def _load(
         data = data.sort_values(self.key_cols)
         data["particleid"] = data.groupby(self.key_cols).ngroup()
 
-        # add release time and termination time columns
+        # add time, release time and termination time columns
+        data["time"] = data["t"]
         data["t0"] = (
             data.groupby("particleid")
             .apply(lambda x: x.t.min())
@@ -135,32 +142,21 @@ def _load(
                 axis=1,
             )
 
-        return dtype, data
+        return self.dtypes["full"], data
 
     def intersect(
-        self, cells, to_recarray
+        self, cells, to_recarray=True
     ) -> Union[List[np.recarray], np.recarray]:
-        if isinstance(cells, (list, tuple)):
-            allint = all(isinstance(el, int) for el in cells)
-            if allint:
-                t = []
-                for el in cells:
-                    t.append((el,))
-                    cells = t
-
-        icell = self._data[["icell"]]
-        cells = np.array(cells, dtype=icell.dtype)
-        inds = np.in1d(icell, cells)
-        epdest = self._data[inds].copy().view(np.recarray)
+        """Find intersection of pathlines with cells."""
+
+        if not all(isinstance(nn, int) for nn in cells):
+            raise ValueError("Expected integer cell numbers")
+
+        idxs = np.in1d(self._data[["icell"]], np.array(cells, dtype=np.int32))
+        sect = self._data[idxs].copy()
+        pids = np.unique(sect["particleid"])
         if to_recarray:
-            # use particle ids to get the rest of the paths
-            inds = np.in1d(self._data["particleid"], epdest.particleid)
-            series = self._data[inds].copy()
-            series.sort(order=["particleid", "time"])
-            series = series.view(np.recarray)
+            idxs = np.in1d(sect["particleid"], pids)
+            return sect[idxs].sort_values(by=["particleid", "time"])
         else:
-            # collect unique particleids in selection
-            partids = np.unique(epdest["particleid"])
-            series = [self.get_data(partid) for partid in partids]
-
-        return series
+            return [self.get_data(pid) for pid in pids]