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Don't write ModelPixelScale, ModelTiepoint when ModelTransformationTag is present #462

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Don't write ModelPixelScale, ModelTiepoint when ModelTransformationTag is present #462

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6 changes: 4 additions & 2 deletions src/geotiffwriter.js
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Original file line number Diff line number Diff line change
Expand Up @@ -355,7 +355,7 @@ export function writeGeotiff(data, metadata) {
metadata.StripByteCounts = [numBands * height * width];
}

if (!metadata.ModelPixelScale) {
if (!metadata.ModelPixelScale && !metadata.ModelTransformation) {
// assumes raster takes up exactly the whole globe
metadata.ModelPixelScale = [360 / width, 180 / height, 0];
}
Expand All @@ -367,7 +367,9 @@ export function writeGeotiff(data, metadata) {
// if didn't pass in projection information, assume the popular 4326 "geographic projection"
if (!metadata.hasOwnProperty('GeographicTypeGeoKey') && !metadata.hasOwnProperty('ProjectedCSTypeGeoKey')) {
metadata.GeographicTypeGeoKey = 4326;
metadata.ModelTiepoint = [0, 0, 0, -180, 90, 0]; // raster fits whole globe
if (!metadata.ModelTransformation) {
metadata.ModelTiepoint = [0, 0, 0, -180, 90, 0]; // raster fits whole globe
}
metadata.GeogCitationGeoKey = 'WGS 84';
metadata.GTModelTypeGeoKey = 2;
}
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