Remove a new test (we'll add it later); fix selectOverview function

locationtech · Apr 1, 2020 · f62214e · f62214e
1 parent d930be7
commit f62214e
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Showing 3 changed files with 6 additions and 9 deletions.
diff --git a/layer/src/test/scala/geotrellis/raster/geotiff/GeoTiffReprojectRasterSourceSpec.scala b/layer/src/test/scala/geotrellis/raster/geotiff/GeoTiffReprojectRasterSourceSpec.scala
@@ -76,13 +76,9 @@ class GeoTiffReprojectRasterSourceSpec extends FunSpec with RasterMatchers with
         LayoutDefinition(RasterExtent(LatLng.worldExtent, CellSize(width*3.5, height*3.5)), tileSize = 256)
       }
 
-      val thriceFuzzySourceAutoHigher = rasterSource.reprojectToGrid(LatLng, thriceFuzzyLayout, NearestNeighbor, AutoHigherResolution).asInstanceOf[GeoTiffReprojectRasterSource]
+      val thriceFuzzySourceAutoHigher = rasterSource.reprojectToGrid(LatLng, thriceFuzzyLayout, NearestNeighbor).asInstanceOf[GeoTiffReprojectRasterSource]
       thriceFuzzySourceAutoHigher.closestTiffOverview.cellSize shouldBe CellSize(20, 20)
 
-      val thriceFuzzySourceAuto = rasterSource.reprojectToGrid(LatLng, thriceFuzzyLayout).asInstanceOf[GeoTiffReprojectRasterSource]
-      thriceFuzzySourceAuto.closestTiffOverview.cellSize.width shouldBe 40.0 +- 0.1
-      thriceFuzzySourceAuto.closestTiffOverview.cellSize.height shouldBe 40.0 +- 0.1
-
       val quatroFuzzyLayout = {
         val CellSize(width, height) = baseReproject.cellSize
         LayoutDefinition(RasterExtent(LatLng.worldExtent, CellSize(width*4.1, height*4.1)), tileSize = 256)

diff --git a/raster/src/main/scala/geotrellis/raster/io/geotiff/OverviewStrategy.scala b/raster/src/main/scala/geotrellis/raster/io/geotiff/OverviewStrategy.scala
@@ -53,8 +53,9 @@ object OverviewStrategy {
         overviewCS.indexOf(overviewCS.min)
       case AutoHigherResolution =>
         val idx = selectIndexByProximity(overviewCS, desiredCS, 1.0)
-        // AutoHigherResolution defaults to Base if index out of bounds
-        if (idx >= overviewCS.size) overviewCS.indexOf(overviewCS.min) else idx
+        // AutoHigherResolution defaults to the closest level
+        // Out of bounds means, that idx = overviewCS.size + 1
+        if (idx > overviewCS.size) idx - 1 else idx
     }
     if (maybeIndex < 0) 0
     else if (maybeIndex >= overviewCS.size) overviewCS.size - 1

diff --git a/raster/src/test/scala/geotrellis/raster/io/geotiff/OverviewStrategySpec.scala b/raster/src/test/scala/geotrellis/raster/io/geotiff/OverviewStrategySpec.scala
@@ -63,10 +63,10 @@ class OverviewStrategySpec extends FunSpec with Matchers {
       selected should be (2)
     }
 
-    it("should select the base overview if out of bounds") {
+    it("should select the best matching overview if out of bounds") {
       val selected =
         OverviewStrategy.selectOverview(availableResolutions, CellSize(32,32), strategy)
-      selected should be (0)
+      selected should be (4)
     }
   }
 }