diff --git a/mainwindow.cpp b/mainwindow.cpp
index be578b65..c5c90f65 100755
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -377,6 +377,7 @@ void MainWindow::loadDataStructures() {
     project->readSecretBaseIds();
     project->readBgEventFacingDirections();
     project->readMapsWithConnections();
+    project->readTilesetProperties();
 }
 
 void MainWindow::populateMapList() {
diff --git a/map.cpp b/map.cpp
index 721d4b17..54298a5c 100755
--- a/map.cpp
+++ b/map.cpp
@@ -1,4 +1,5 @@
 #include "map.h"
+#include "project.h"
 
 #include <QTime>
 #include <QDebug>
@@ -68,7 +69,7 @@ uint16_t Map::getSelectedBlockIndex(int index) {
     if (index < layout->tileset_primary->metatiles->length()) {
         return static_cast<uint16_t>(index);
     } else {
-        return 0x200 + static_cast<uint16_t>(index - layout->tileset_primary->metatiles->length());
+        return static_cast<uint16_t>(Project::getNumMetatilesPrimary() + index - layout->tileset_primary->metatiles->length());
     }
 }
 
@@ -76,7 +77,7 @@ int Map::getDisplayedBlockIndex(int index) {
     if (index < layout->tileset_primary->metatiles->length()) {
         return index;
     } else {
-        return index - 0x200 + layout->tileset_primary->metatiles->length();
+        return index - Project::getNumMetatilesPrimary() + layout->tileset_primary->metatiles->length();
     }
 }
 
@@ -337,7 +338,7 @@ QPixmap Map::renderMetatiles() {
     for (int i = 0; i < length_; i++) {
         int tile = i;
         if (i >= primary_length) {
-            tile += 0x200 - primary_length;
+            tile += Project::getNumMetatilesPrimary() - primary_length;
         }
         QImage metatile_image = Metatile::getMetatileImage(tile, layout->tileset_primary, layout->tileset_secondary);
         int map_y = i / width_;
diff --git a/project.cpp b/project.cpp
index b3b625ba..9cce7bbb 100755
--- a/project.cpp
+++ b/project.cpp
@@ -12,6 +12,13 @@
 #include <QMessageBox>
 #include <QRegularExpression>
 
+int Project::num_tiles_primary = 512;
+int Project::num_tiles_total = 1024;
+int Project::num_metatiles_primary = 512;
+int Project::num_metatiles_total = 1024;
+int Project::num_pals_primary = 6;
+int Project::num_pals_total = 13;
+
 Project::Project()
 {
     groupNames = new QStringList;
@@ -1121,6 +1128,64 @@ QMap<QString, QStringList> Project::getTilesets() {
     return allTilesets;
 }
 
+void Project::readTilesetProperties() {
+    QStringList defines;
+    QString text = readTextFile(root + "/include/fieldmap.h");
+    if (!text.isNull()) {
+        bool error = false;
+        QStringList definePrefixes;
+        definePrefixes << "NUM_";
+        QMap<QString, int> defines = readCDefines(text, definePrefixes);
+        auto it = defines.find("NUM_TILES_IN_PRIMARY");
+        if (it != defines.end()) {
+            Project::num_tiles_primary = it.value();
+        }
+        else {
+            error = true;
+        }
+        it = defines.find("NUM_TILES_TOTAL");
+        if (it != defines.end()) {
+            Project::num_tiles_total = it.value();
+        }
+        else {
+            error = true;
+        }
+        it = defines.find("NUM_METATILES_IN_PRIMARY");
+        if (it != defines.end()) {
+            Project::num_metatiles_primary = it.value();
+        }
+        else {
+            error = true;
+        }
+        it = defines.find("NUM_METATILES_TOTAL");
+        if (it != defines.end()) {
+            Project::num_metatiles_total = it.value();
+        }
+        else {
+            error = true;
+        }
+        it = defines.find("NUM_PALS_IN_PRIMARY");
+        if (it != defines.end()) {
+            Project::num_pals_primary = it.value();
+        }
+        else {
+            error = true;
+        }
+        it = defines.find("NUM_PALS_TOTAL");
+        if (it != defines.end()) {
+            Project::num_pals_total = it.value();
+        }
+        else {
+            error = true;
+        }
+
+        if (error)
+        {
+            qDebug() << "Some global tileset values could not be loaded. Using default values";
+        }
+    }
+}
+
 void Project::readRegionMapSections() {
     QString filepath = root + "/include/constants/region_map_sections.h";
     QStringList prefixes = (QStringList() << "MAPSEC_");
@@ -1666,3 +1731,33 @@ QMap<QString, int> Project::readCDefines(QString text, QStringList prefixes) {
     }
     return filteredDefines;
 }
+
+int Project::getNumTilesPrimary()
+{
+    return Project::num_tiles_primary;
+}
+
+int Project::getNumTilesTotal()
+{
+    return Project::num_tiles_total;
+}
+
+int Project::getNumMetatilesPrimary()
+{
+    return Project::num_metatiles_primary;
+}
+
+int Project::getNumMetatilesTotal()
+{
+    return Project::num_metatiles_total;
+}
+
+int Project::getNumPalettesPrimary()
+{
+    return Project::num_pals_primary;
+}
+
+int Project::getNumPalettesTotal()
+{
+    return Project::num_pals_total;
+}
diff --git a/project.h b/project.h
index fb630f38..cb1a10ee 100755
--- a/project.h
+++ b/project.h
@@ -88,6 +88,7 @@ public:
     QStringList getSongNames();
     QStringList getVisibilities();
     QMap<QString, QStringList> getTilesets();
+    void readTilesetProperties();
     void readRegionMapSections();
     void readItemNames();
     void readFlagNames();
@@ -114,6 +115,13 @@ public:
     QStringList readCArray(QString text, QString label);
     QString readCIncbin(QString text, QString label);
     QMap<QString, int> readCDefines(QString text, QStringList prefixes);
+
+    static int getNumTilesPrimary();
+    static int getNumTilesTotal();
+    static int getNumMetatilesPrimary();
+    static int getNumMetatilesTotal();
+    static int getNumPalettesPrimary();
+    static int getNumPalettesTotal();
 private:
     QString getMapLayoutsTableFilepath();
     QString getMapLayoutFilepath(QString);
@@ -132,6 +140,13 @@ private:
     void setNewMapBorder(Map *map);
     void setNewMapEvents(Map *map);
     void setNewMapConnections(Map *map);
+
+    static int num_tiles_primary;
+    static int num_tiles_total;
+    static int num_metatiles_primary;
+    static int num_metatiles_total;
+    static int num_pals_primary;
+    static int num_pals_total;
 };
 
 #endif // PROJECT_H
diff --git a/tileset.cpp b/tileset.cpp
index df368170..55fa6258 100755
--- a/tileset.cpp
+++ b/tileset.cpp
@@ -1,4 +1,5 @@
 #include "tileset.h"
+#include "project.h"
 
 #include <QPainter>
 #include <QImage>
@@ -88,8 +89,7 @@ QImage Metatile::getMetatileTile(int tile, Tileset *primaryTileset, Tileset *sec
 }
 
 Tileset* Metatile::getBlockTileset(int metatile_index, Tileset *primaryTileset, Tileset *secondaryTileset) {
-    int primary_size = 0x200;
-    if (metatile_index < primary_size) {
+    if (metatile_index < Project::getNumMetatilesPrimary()) {
         return primaryTileset;
     } else {
         return secondaryTileset;
@@ -97,24 +97,19 @@ Tileset* Metatile::getBlockTileset(int metatile_index, Tileset *primaryTileset,
 }
 
 int Metatile::getBlockIndex(int index) {
-    int primary_size = 0x200;
-    if (index < primary_size) {
+    if (index < Project::getNumMetatilesPrimary()) {
         return index;
     } else {
-        return index - primary_size;
+        return index - Project::getNumMetatilesPrimary();
     }
 }
 
 QList<QList<QRgb>> Metatile::getBlockPalettes(Tileset *primaryTileset, Tileset *secondaryTileset) {
     QList<QList<QRgb>> palettes;
-    for (int i = 0; i < 6; i++) {
+    for (int i = 0; i < Project::getNumPalettesPrimary(); i++) {
         palettes.append(primaryTileset->palettes->at(i));
     }
-
-    // TODO: Find a reliable way to detect Ruby vs. Emerald
-    // Ruby's secondary tilesets only use palettes 6-11, whereas
-    // Emerald uses 6-12.
-    for (int i = 6; i < 13; i++) {
+    for (int i = Project::getNumPalettesPrimary(); i < Project::getNumPalettesTotal(); i++) {
         palettes.append(secondaryTileset->palettes->at(i));
     }
     return palettes;