diff --git a/datasets/epa-ch4emission-yeargrid-v2express-mg.data.mdx b/datasets/epa-ch4emission-yeargrid-v2express-mg.data.mdx
index e9459407a..b1b3ebd0e 100644
--- a/datasets/epa-ch4emission-yeargrid-v2express-mg.data.mdx
+++ b/datasets/epa-ch4emission-yeargrid-v2express-mg.data.mdx
@@ -52,7 +52,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-methane
@@ -107,7 +107,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-agriculture
@@ -161,7 +161,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan      
+      nodata: -9999      
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: enteric-fermentation
@@ -215,7 +215,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: manure-management
@@ -269,7 +269,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: rice-cultivation-l
@@ -323,7 +323,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: field-burning-l
@@ -377,7 +377,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-natural-gas
@@ -431,7 +431,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: exploration-ngs-l
@@ -485,7 +485,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: production-ngs-l
@@ -539,7 +539,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2b-transmission-storage-ngs
@@ -593,7 +593,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2b-processing-ngs
@@ -647,7 +647,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2b-distribution-ngs
@@ -701,7 +701,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: post-meter-ng
@@ -755,7 +755,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-petroleum
@@ -809,7 +809,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2a-exploration-ps
@@ -863,7 +863,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2a-production-ps
@@ -917,7 +917,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2a-transport-ps
@@ -971,7 +971,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B2a-refining-ps
@@ -1016,7 +1016,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-waste
@@ -1070,7 +1070,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 5A1-msw-landfill-waste
@@ -1124,7 +1124,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 5A1-industrial-landfill-waste
@@ -1178,7 +1178,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 5A1-dwtd-waste
@@ -1232,7 +1232,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 5A1-iwtd-waste
@@ -1286,7 +1286,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 5A1-composting-waste
@@ -1340,7 +1340,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-coal-mines
@@ -1394,7 +1394,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B1a-underground-coal
@@ -1448,7 +1448,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B1a-abn-underground-coal
@@ -1502,7 +1502,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1B1a-surface-coal
@@ -1556,7 +1556,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: total-other
@@ -1610,7 +1610,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1A-stationary-combustion-other
@@ -1664,7 +1664,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1A-mobile-combustion-othe
@@ -1718,7 +1718,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1A-abn-ong-other
@@ -1772,7 +1772,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1A-petro-production-other
@@ -1826,7 +1826,7 @@ layers:
       rescale:
         - 0
         - 0.005
-      nodata: nan
+      nodata: -9999
     compare:
       datasetId: epa-ch4emission-yeargrid-v2express_mg_km
       layerId: 1A-ferroalloy-production-other