diff --git a/src/qlever-petrimaps/GeoJSONCache.h b/src/qlever-petrimaps/GeoJSONCache.h
index 8a3cb9c..85d8b60 100644
--- a/src/qlever-petrimaps/GeoJSONCache.h
+++ b/src/qlever-petrimaps/GeoJSONCache.h
@@ -22,6 +22,16 @@ class GeoJSONCache : public GeomCache {
     return *this;
   };
 
+  const util::geo::FPoint& getPoint(ID_TYPE id) const {
+    return std::get<0>(_points[id]);
+  }
+  size_t getLine(ID_TYPE id) const {
+    return std::get<0>(_lines[id]);
+  }
+  size_t getLineEnd(ID_TYPE id) const {
+    return id + 1 < _lines.size() ? getLine(id + 1) : _linePoints.size();
+  }
+
   void load();
   void setContent(const std::string& content);
   std::vector<std::pair<ID_TYPE, ID_TYPE>> getRelObjects() const;
@@ -36,6 +46,8 @@ class GeoJSONCache : public GeomCache {
   // Map geomID to map<key, value>
   std::map<size_t, std::map<std::string, std::string>> _attr;
   // ------------------------
+  std::vector<std::tuple<util::geo::FPoint, bool>> _points;
+  std::vector<std::tuple<size_t, bool>> _lines;
 
  protected:
     
diff --git a/src/qlever-petrimaps/GeomCache.h b/src/qlever-petrimaps/GeomCache.h
index 78a4623..b563edc 100644
--- a/src/qlever-petrimaps/GeomCache.h
+++ b/src/qlever-petrimaps/GeomCache.h
@@ -40,18 +40,13 @@ class GeomCache {
     return ready;
   }
 
-  const util::geo::FPoint& getPoint(ID_TYPE id) const {
-    return std::get<0>(_points[id]);
-  }
+  const virtual util::geo::FPoint& getPoint(ID_TYPE id) const = 0;
+  virtual size_t getLine(ID_TYPE id) const = 0;
+  virtual size_t getLineEnd(ID_TYPE id) const = 0;
+
   const std::vector<util::geo::Point<int16_t>>& getLinePoints() const {
     return _linePoints;
   }
-  size_t getLine(ID_TYPE id) const {
-    return std::get<0>(_lines[id]);
-  }
-  size_t getLineEnd(ID_TYPE id) const {
-    return id + 1 < _lines.size() ? getLine(id + 1) : _linePoints.size();
-  }
   
   util::geo::DBox getLineBBox(size_t id) const;
 
@@ -74,8 +69,6 @@ class GeomCache {
   mutable std::mutex _m;
   bool _ready = false;
 
-  std::vector<std::tuple<util::geo::FPoint, bool>> _points;
-  std::vector<std::tuple<size_t, bool>> _lines;
   std::vector<util::geo::Point<int16_t>> _linePoints;
 
   static bool pointValid(const util::geo::FPoint& p);
diff --git a/src/qlever-petrimaps/SPARQLCache.cpp b/src/qlever-petrimaps/SPARQLCache.cpp
index adcda49..9c1ec11 100644
--- a/src/qlever-petrimaps/SPARQLCache.cpp
+++ b/src/qlever-petrimaps/SPARQLCache.cpp
@@ -629,7 +629,7 @@ void SPARQLCache::request() {
   _points.resize(_pointsFSize);
   _pointsF.seekg(0);
   _pointsF.read(reinterpret_cast<char*>(&_points[0]),
-                sizeof(std::tuple<util::geo::FPoint, bool>) * _pointsFSize);
+                sizeof(util::geo::FPoint) * _pointsFSize);
   _pointsF.close();
 
   _linePoints.resize(_linePointsFSize);
@@ -641,7 +641,7 @@ void SPARQLCache::request() {
   _lines.resize(_linesFSize);
   _linesF.seekg(0);
   _linesF.read(reinterpret_cast<char*>(&_lines[0]),
-               sizeof(std::tuple<size_t, bool>) * _linesFSize);
+               sizeof(size_t) * _linesFSize);
   _linesF.close();
 
   _qidToId.resize(_qidToIdFSize);
@@ -950,7 +950,7 @@ void SPARQLCache::fromDisk(const std::string& fname) {
   f.read(reinterpret_cast<char*>(&numPoints), sizeof(size_t));
   _points.resize(numPoints);
   posPoints = f.tellg();
-  f.seekg(sizeof(std::tuple<util::geo::FPoint, bool>) * numPoints, f.cur);
+  f.seekg(sizeof(util::geo::FPoint) * numPoints, f.cur);
 
   // linePoints
   f.read(reinterpret_cast<char*>(&numLinePoints), sizeof(size_t));
@@ -962,7 +962,7 @@ void SPARQLCache::fromDisk(const std::string& fname) {
   f.read(reinterpret_cast<char*>(&numLines), sizeof(size_t));
   _lines.resize(numLines);
   posLines = f.tellg();
-  f.seekg(sizeof(std::tuple<size_t, bool>) * numLines, f.cur);
+  f.seekg(sizeof(size_t) * numLines, f.cur);
 
   // qidToId
   f.read(reinterpret_cast<char*>(&numQidToId), sizeof(size_t));
@@ -1020,7 +1020,7 @@ void SPARQLCache::serializeToDisk(const std::string& fname) const {
   size_t num = _points.size();
   f.write(reinterpret_cast<const char*>(&num), sizeof(size_t));
   f.write(reinterpret_cast<const char*>(&_points[0]),
-          sizeof(std::tuple<util::geo::FPoint, bool>) * num);
+          sizeof(util::geo::FPoint) * num);
 
   num = _linePoints.size();
   f.write(reinterpret_cast<const char*>(&num), sizeof(size_t));
@@ -1029,7 +1029,7 @@ void SPARQLCache::serializeToDisk(const std::string& fname) const {
 
   num = _lines.size();
   f.write(reinterpret_cast<const char*>(&num), sizeof(size_t));
-  f.write(reinterpret_cast<const char*>(&_lines[0]), sizeof(std::tuple<size_t, bool>) * num);
+  f.write(reinterpret_cast<const char*>(&_lines[0]), sizeof(size_t) * num);
 
   num = _qidToId.size();
   f.write(reinterpret_cast<const char*>(&num), sizeof(size_t));
diff --git a/src/qlever-petrimaps/SPARQLCache.h b/src/qlever-petrimaps/SPARQLCache.h
index 154cbf0..18aefef 100644
--- a/src/qlever-petrimaps/SPARQLCache.h
+++ b/src/qlever-petrimaps/SPARQLCache.h
@@ -27,6 +27,16 @@ class SPARQLCache : public GeomCache {
     return *this;
   };
 
+  const util::geo::FPoint& getPoint(ID_TYPE id) const {
+    return _points[id];
+  }
+  size_t getLine(ID_TYPE id) const {
+    return _lines[id];
+  }
+  size_t getLineEnd(ID_TYPE id) const {
+    return id + 1 < _lines.size() ? getLine(id + 1) : _linePoints.size();
+  }
+
   std::string load(const std::string& cacheFile);
   void request();
   size_t requestSize();
@@ -83,6 +93,8 @@ class SPARQLCache : public GeomCache {
   IdMapping _lastQidToId;
 
   std::vector<IdMapping> _qidToId;
+  std::vector<util::geo::FPoint> _points;
+  std::vector<size_t> _lines;
 
   std::string _dangling, _prev, _raw;
   ParseState _state;