diff --git a/cmd/tegola/cmd/cache/seed_purge.go b/cmd/tegola/cmd/cache/seed_purge.go
index 46d8ee9e..7e0383df 100644
--- a/cmd/tegola/cmd/cache/seed_purge.go
+++ b/cmd/tegola/cmd/cache/seed_purge.go
@@ -9,6 +9,7 @@ import (
 	"github.com/go-spatial/cobra"
 	"github.com/go-spatial/geom"
 	"github.com/go-spatial/geom/slippy"
+	"github.com/go-spatial/proj"
 	"github.com/go-spatial/tegola/atlas"
 	"github.com/go-spatial/tegola/internal/build"
 	gdcmd "github.com/go-spatial/tegola/internal/cmd"
@@ -51,6 +52,8 @@ var (
 	cacheMap string
 	// while seeding, on log output for tiles that take longer than this (in milliseconds) to render
 	cacheLogThreshold int64
+	// the grid system that the bounds is at. If set then we should use WGS84, otherwise assume it's in Pseudo-Mercator
+	cacheBoundsWGS84 bool
 )
 
 // variables that are not flags but set by the command.
@@ -76,6 +79,7 @@ func init() {
 	SeedPurgeCmd.PersistentFlags().Int64VarP(&cacheLogThreshold, "log-threshold", "", 0, "during seeding, only log tiles that take this number of milliseconds or longer to render (default all tiles)")
 
 	SeedPurgeCmd.Flags().StringVarP(&cacheBounds, "bounds", "", "-180,-85.0511,180,85.0511", "lng/lat bounds to seed the cache with in the format: minx, miny, maxx, maxy")
+	SeedPurgeCmd.PersistentFlags().BoolVarP(&cacheBoundsWGS84, "wgs84", "", false, "the grid system for bounds. This flag indicates that the grid is WGS 84; otherwise it's assumed to be in Pseudo-Mercator")
 
 	SeedPurgeCmd.PersistentPreRunE = seedPurgeCmdValidatePersistent
 	SeedPurgeCmd.PreRunE = seedPurgeCmdValidate
@@ -191,19 +195,27 @@ func seedPurgeCommand(_ *cobra.Command, _ []string) (err error) {
 		}
 	}()
 
+	srid := proj.EPSGCode(proj.EPSG3857)
+	if cacheBoundsWGS84 {
+		srid = proj.EPSG4326
+	}
+	grid := slippy.NewGrid(srid, 0)
+
 	log.Info("zoom list: ", zooms)
-	tileChannel := generateTilesForBounds(ctx, seedPurgeBounds, zooms)
+	tileChannel := generateTilesForBounds(ctx, seedPurgeBounds, zooms, grid)
 
 	return doWork(ctx, tileChannel, seedPurgeMaps, cacheConcurrency, seedPurgeWorker)
 }
 
-func generateTilesForBounds(ctx context.Context, bounds [4]float64, zooms []uint) *TileChannel {
+func generateTilesForBounds(ctx context.Context, bounds [4]float64, zooms []uint, grid slippy.TileGridder) *TileChannel {
 
 	tce := &TileChannel{
 		channel: make(chan slippy.Tile),
 	}
 
-	webmercatorGrid := slippy.NewGrid(3857, 0)
+	if grid == nil {
+		grid = slippy.NewGrid(proj.EPSG3857, 0)
+	}
 
 	go func() {
 		defer tce.Close()
@@ -211,7 +223,7 @@ func generateTilesForBounds(ctx context.Context, bounds [4]float64, zooms []uint
 		var extent geom.Extent = bounds
 		for _, z := range zooms {
 
-			tiles, err := slippy.FromBounds(webmercatorGrid, &extent, slippy.Zoom(z))
+			tiles, err := slippy.FromBounds(grid, &extent, slippy.Zoom(z))
 			if err != nil {
 				tce.setError(fmt.Errorf("got error trying to get tiles: %w", err))
 				tce.Close()
diff --git a/cmd/tegola/cmd/cache/seed_purge_generator_test.go b/cmd/tegola/cmd/cache/seed_purge_generator_test.go
index 6973769f..8fd8f36d 100644
--- a/cmd/tegola/cmd/cache/seed_purge_generator_test.go
+++ b/cmd/tegola/cmd/cache/seed_purge_generator_test.go
@@ -8,6 +8,7 @@ import (
 	"testing"
 
 	"github.com/go-spatial/geom/slippy"
+	"github.com/go-spatial/proj"
 )
 
 type sTiles []slippy.Tile
@@ -70,6 +71,7 @@ func TestGenerateTilesForBounds(t *testing.T) {
 		zooms  []uint
 		bounds [4]float64
 		tiles  sTiles
+		grid   slippy.TileGridder
 		err    error
 	}
 
@@ -77,7 +79,7 @@ func TestGenerateTilesForBounds(t *testing.T) {
 		return func(t *testing.T) {
 
 			// Setup up the generator.
-			tilechannel := generateTilesForBounds(context.Background(), tc.bounds, tc.zooms)
+			tilechannel := generateTilesForBounds(context.Background(), tc.bounds, tc.zooms, tc.grid)
 			tiles := make(sTiles, 0, len(tc.tiles))
 			for tile := range tilechannel.Channel() {
 				tiles = append(tiles, tile)
@@ -127,6 +129,28 @@ func TestGenerateTilesForBounds(t *testing.T) {
 				slippy.Tile{Z: 1, X: 1, Y: 1},
 			},
 		},
+		"min_zoom=1 max_zoom=1 bounds=5.9,45.8,10.5,47.8 WSG84": {
+			// see: https://github.com/go-spatial/tegola/issues/880#issuecomment-2556563251
+			zooms:  []uint{10},
+			bounds: [4]float64{5.9, 45.8, 10.5, 47.8},
+			grid:   slippy.NewGrid(proj.EPSG4326, 0),
+			tiles: sTiles{
+				slippy.Tile{Z: 10, X: 528, Y: 356}, slippy.Tile{Z: 10, X: 528, Y: 357}, slippy.Tile{Z: 10, X: 528, Y: 358}, slippy.Tile{Z: 10, X: 528, Y: 359}, slippy.Tile{Z: 10, X: 528, Y: 360}, slippy.Tile{Z: 10, X: 528, Y: 361}, slippy.Tile{Z: 10, X: 528, Y: 362}, slippy.Tile{Z: 10, X: 528, Y: 363}, slippy.Tile{Z: 10, X: 528, Y: 364}, slippy.Tile{Z: 10, X: 528, Y: 365},
+				slippy.Tile{Z: 10, X: 529, Y: 356}, slippy.Tile{Z: 10, X: 529, Y: 357}, slippy.Tile{Z: 10, X: 529, Y: 358}, slippy.Tile{Z: 10, X: 529, Y: 359}, slippy.Tile{Z: 10, X: 529, Y: 360}, slippy.Tile{Z: 10, X: 529, Y: 361}, slippy.Tile{Z: 10, X: 529, Y: 362}, slippy.Tile{Z: 10, X: 529, Y: 363}, slippy.Tile{Z: 10, X: 529, Y: 364}, slippy.Tile{Z: 10, X: 529, Y: 365},
+				slippy.Tile{Z: 10, X: 530, Y: 356}, slippy.Tile{Z: 10, X: 530, Y: 357}, slippy.Tile{Z: 10, X: 530, Y: 358}, slippy.Tile{Z: 10, X: 530, Y: 359}, slippy.Tile{Z: 10, X: 530, Y: 360}, slippy.Tile{Z: 10, X: 530, Y: 361}, slippy.Tile{Z: 10, X: 530, Y: 362}, slippy.Tile{Z: 10, X: 530, Y: 363}, slippy.Tile{Z: 10, X: 530, Y: 364}, slippy.Tile{Z: 10, X: 530, Y: 365},
+				slippy.Tile{Z: 10, X: 531, Y: 356}, slippy.Tile{Z: 10, X: 531, Y: 357}, slippy.Tile{Z: 10, X: 531, Y: 358}, slippy.Tile{Z: 10, X: 531, Y: 359}, slippy.Tile{Z: 10, X: 531, Y: 360}, slippy.Tile{Z: 10, X: 531, Y: 361}, slippy.Tile{Z: 10, X: 531, Y: 362}, slippy.Tile{Z: 10, X: 531, Y: 363}, slippy.Tile{Z: 10, X: 531, Y: 364}, slippy.Tile{Z: 10, X: 531, Y: 365},
+				slippy.Tile{Z: 10, X: 532, Y: 356}, slippy.Tile{Z: 10, X: 532, Y: 357}, slippy.Tile{Z: 10, X: 532, Y: 358}, slippy.Tile{Z: 10, X: 532, Y: 359}, slippy.Tile{Z: 10, X: 532, Y: 360}, slippy.Tile{Z: 10, X: 532, Y: 361}, slippy.Tile{Z: 10, X: 532, Y: 362}, slippy.Tile{Z: 10, X: 532, Y: 363}, slippy.Tile{Z: 10, X: 532, Y: 364}, slippy.Tile{Z: 10, X: 532, Y: 365},
+				slippy.Tile{Z: 10, X: 533, Y: 356}, slippy.Tile{Z: 10, X: 533, Y: 357}, slippy.Tile{Z: 10, X: 533, Y: 358}, slippy.Tile{Z: 10, X: 533, Y: 359}, slippy.Tile{Z: 10, X: 533, Y: 360}, slippy.Tile{Z: 10, X: 533, Y: 361}, slippy.Tile{Z: 10, X: 533, Y: 362}, slippy.Tile{Z: 10, X: 533, Y: 363}, slippy.Tile{Z: 10, X: 533, Y: 364}, slippy.Tile{Z: 10, X: 533, Y: 365},
+				slippy.Tile{Z: 10, X: 534, Y: 356}, slippy.Tile{Z: 10, X: 534, Y: 357}, slippy.Tile{Z: 10, X: 534, Y: 358}, slippy.Tile{Z: 10, X: 534, Y: 359}, slippy.Tile{Z: 10, X: 534, Y: 360}, slippy.Tile{Z: 10, X: 534, Y: 361}, slippy.Tile{Z: 10, X: 534, Y: 362}, slippy.Tile{Z: 10, X: 534, Y: 363}, slippy.Tile{Z: 10, X: 534, Y: 364}, slippy.Tile{Z: 10, X: 534, Y: 365},
+				slippy.Tile{Z: 10, X: 535, Y: 356}, slippy.Tile{Z: 10, X: 535, Y: 357}, slippy.Tile{Z: 10, X: 535, Y: 358}, slippy.Tile{Z: 10, X: 535, Y: 359}, slippy.Tile{Z: 10, X: 535, Y: 360}, slippy.Tile{Z: 10, X: 535, Y: 361}, slippy.Tile{Z: 10, X: 535, Y: 362}, slippy.Tile{Z: 10, X: 535, Y: 363}, slippy.Tile{Z: 10, X: 535, Y: 364}, slippy.Tile{Z: 10, X: 535, Y: 365},
+				slippy.Tile{Z: 10, X: 536, Y: 356}, slippy.Tile{Z: 10, X: 536, Y: 357}, slippy.Tile{Z: 10, X: 536, Y: 358}, slippy.Tile{Z: 10, X: 536, Y: 359}, slippy.Tile{Z: 10, X: 536, Y: 360}, slippy.Tile{Z: 10, X: 536, Y: 361}, slippy.Tile{Z: 10, X: 536, Y: 362}, slippy.Tile{Z: 10, X: 536, Y: 363}, slippy.Tile{Z: 10, X: 536, Y: 364}, slippy.Tile{Z: 10, X: 536, Y: 365},
+				slippy.Tile{Z: 10, X: 537, Y: 356}, slippy.Tile{Z: 10, X: 537, Y: 357}, slippy.Tile{Z: 10, X: 537, Y: 358}, slippy.Tile{Z: 10, X: 537, Y: 359}, slippy.Tile{Z: 10, X: 537, Y: 360}, slippy.Tile{Z: 10, X: 537, Y: 361}, slippy.Tile{Z: 10, X: 537, Y: 362}, slippy.Tile{Z: 10, X: 537, Y: 363}, slippy.Tile{Z: 10, X: 537, Y: 364}, slippy.Tile{Z: 10, X: 537, Y: 365},
+				slippy.Tile{Z: 10, X: 538, Y: 356}, slippy.Tile{Z: 10, X: 538, Y: 357}, slippy.Tile{Z: 10, X: 538, Y: 358}, slippy.Tile{Z: 10, X: 538, Y: 359}, slippy.Tile{Z: 10, X: 538, Y: 360}, slippy.Tile{Z: 10, X: 538, Y: 361}, slippy.Tile{Z: 10, X: 538, Y: 362}, slippy.Tile{Z: 10, X: 538, Y: 363}, slippy.Tile{Z: 10, X: 538, Y: 364}, slippy.Tile{Z: 10, X: 538, Y: 365},
+				slippy.Tile{Z: 10, X: 539, Y: 356}, slippy.Tile{Z: 10, X: 539, Y: 357}, slippy.Tile{Z: 10, X: 539, Y: 358}, slippy.Tile{Z: 10, X: 539, Y: 359}, slippy.Tile{Z: 10, X: 539, Y: 360}, slippy.Tile{Z: 10, X: 539, Y: 361}, slippy.Tile{Z: 10, X: 539, Y: 362}, slippy.Tile{Z: 10, X: 539, Y: 363}, slippy.Tile{Z: 10, X: 539, Y: 364}, slippy.Tile{Z: 10, X: 539, Y: 365},
+				slippy.Tile{Z: 10, X: 540, Y: 356}, slippy.Tile{Z: 10, X: 540, Y: 357}, slippy.Tile{Z: 10, X: 540, Y: 358}, slippy.Tile{Z: 10, X: 540, Y: 359}, slippy.Tile{Z: 10, X: 540, Y: 360}, slippy.Tile{Z: 10, X: 540, Y: 361}, slippy.Tile{Z: 10, X: 540, Y: 362}, slippy.Tile{Z: 10, X: 540, Y: 363}, slippy.Tile{Z: 10, X: 540, Y: 364}, slippy.Tile{Z: 10, X: 540, Y: 365},
+				slippy.Tile{Z: 10, X: 541, Y: 356}, slippy.Tile{Z: 10, X: 541, Y: 357}, slippy.Tile{Z: 10, X: 541, Y: 358}, slippy.Tile{Z: 10, X: 541, Y: 359}, slippy.Tile{Z: 10, X: 541, Y: 360}, slippy.Tile{Z: 10, X: 541, Y: 361}, slippy.Tile{Z: 10, X: 541, Y: 362}, slippy.Tile{Z: 10, X: 541, Y: 363}, slippy.Tile{Z: 10, X: 541, Y: 364}, slippy.Tile{Z: 10, X: 541, Y: 365},
+			},
+		},
 	}
 
 	for name, tc := range tests {