[GIS] How to convert from GeoTIFF to PNG/JPG and Web Mercator in Java

convertcoordinate systemgeotiff-tiffraster

I'd like to convert raster image from (geo)tiff to an png/jpg and afterwards if it is necessary … I'd like to convert the coordinates with help of EPSG-Codes to the OSM/Google Projection(EPSG: 3857/ 900913). All this i'm doing with java programming.
Anyone a good hint… like an java libary??

Thanks a lot.

Best Answer

GeoTools should be able to do all of that - either natively or through the GDAL bindings.

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GDAL – How to Convert a PNG with Known Bounds from Plate Carree to Mercator

Problem solved. Changing the order to LeftLon UpperLat RightLon BottomLat in my second approach gdal_translate did it for me!!

[GIS] GeoTools and PostGIS with ESPG:3857

Always be aware of the axis order. PostGIS always uses the axis order: longitude (x), latitude (y).

-- Somewhere in Chicago, USA
SELECT ST_AsText(ST_Transform(ST_SetSRID(ST_Point(-87.642970, 41.937832), 4326), 3857));
-- POINT(-9756370.79201015 5151671.52336743)

-- Somewhere in Antarctica
SELECT ST_AsText(ST_Transform(ST_SetSRID(ST_Point(41.937832, -87.642970), 4326), 3857));
-- POINT(4668498.10321386 -24771604.6229288)

Best Answer

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GDAL – How to Convert a PNG with Known Bounds from Plate Carree to Mercator

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