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-rw-r--r--shared/src/commonMain/kotlin/mx/trackermap/TrackerMap/utils/MapCalculus.kt7
1 files changed, 6 insertions, 1 deletions
diff --git a/shared/src/commonMain/kotlin/mx/trackermap/TrackerMap/utils/MapCalculus.kt b/shared/src/commonMain/kotlin/mx/trackermap/TrackerMap/utils/MapCalculus.kt
index 8c58179..d4c5261 100644
--- a/shared/src/commonMain/kotlin/mx/trackermap/TrackerMap/utils/MapCalculus.kt
+++ b/shared/src/commonMain/kotlin/mx/trackermap/TrackerMap/utils/MapCalculus.kt
@@ -2,7 +2,12 @@ package mx.trackermap.TrackerMap.utils
class MapCalculus {
companion object {
- // Source: https://github.com/openstreetmap/mapnik-stylesheets/blob/master/zoom-to-scale.txt
+ /**
+ * WhirlyGlobe library uses height rather than zoom levels, but it supports converting
+ * Mapnik denominator scales to height, so we can first convert zoom levels to Mapnik
+ * denominator scales, and then convert them to height using WhirlyGlobe.
+ * Source: https://github.com/openstreetmap/mapnik-stylesheets/blob/master/zoom-to-scale.txt
+ */
fun zoomLevelToScale(zoom: Int): Double? =
when (zoom) {
1 -> 279541132.014