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1) I just don't know how to convert .geojson file to .shp. This is a one of the bases of ogr Python. If you have a geometry, it is very easy to convert it to a shapefile # geojson is GeoJson Polygon from osgeo import ogr output = "geojson.shp" driver = ogr.GetDriverByName('ESRI Shapefile') if os.path.exists(output): driver.DeleteDataSource(output) ...


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To cut an image (tif file) by using GDAL python library, and without gdalwarp utility, you need to find row and column raster indexes of top point [p1=(minX, maxY)] and bottom point [p2=(maxX, minY)]. The formulas, based in your code, are: i1 = int((p1[0] - xOrigin) / pixelWidth) j1 = int((yOrigin - p1[1] ) / pixelHeight) i2 = int((p2[0] - xOrigin) / ...


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sr.ImportFromEPSG() You have the S and P transposed. For the record, I don't see an entry for EPSG::29613 so that code may be invalid or deprecated. http://epsg.io/?q=29613


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Have a look at this repository, it's a list with all the online resources to learn CartoDB, a open-source geospatial platform. From their Map Academy and tutorials to related programming languages such as SQL, CartoCSS or Javascript. The repo is in Spanish, but all the links are in English.



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