geoTools.py 文件源码

def pixelToGeoCoord(xPix, yPix, inputRaster, sourceSR='', geomTransform='', targetSR=''):
    # If you want to garuntee lon lat output, specify TargetSR  otherwise, geocoords will be in image geo reference
    # targetSR = osr.SpatialReference()
    # targetSR.ImportFromEPSG(4326)
    # Transform can be performed at the polygon level instead of pixel level

    if targetSR =='':
        performReprojection=False
        targetSR = osr.SpatialReference()
        targetSR.ImportFromEPSG(4326)
    else:
        performReprojection=True

    if geomTransform=='':
        srcRaster = gdal.Open(inputRaster)
        geomTransform = srcRaster.GetGeoTransform()

        source_sr = osr.SpatialReference()
        source_sr.ImportFromWkt(srcRaster.GetProjectionRef())




    geom = ogr.Geometry(ogr.wkbPoint)
    xOrigin = geomTransform[0]
    yOrigin = geomTransform[3]
    pixelWidth = geomTransform[1]
    pixelHeight = geomTransform[5]

    xCoord = (xPix * pixelWidth) + xOrigin
    yCoord = (yPix * pixelHeight) + yOrigin
    geom.AddPoint(xCoord, yCoord)


    if performReprojection:
        if sourceSR=='':
            srcRaster = gdal.Open(inputRaster)
            sourceSR = osr.SpatialReference()
            sourceSR.ImportFromWkt(srcRaster.GetProjectionRef())
        coord_trans = osr.CoordinateTransformation(sourceSR, targetSR)
        geom.Transform(coord_trans)

    return (geom.GetX(), geom.GetY())