A library to copy a raster into memory. This is esp. useful for raster types...

A library to copy a raster into memory. This is esp. useful for raster types such as TileTiffRaster which seem not to support repeated reading

formats/__init__.py

@@ -3,4 +3,5 @@ from .floatingpointraster import FloatingPointRaster;
 from .gridenvelope2d import GridEnvelope2D;
 from .netcdf4envelope2d import Netcdf4Envelope2D;
 from .hdf5raster import Hdf5Raster;
-from .netcdf4raster import Netcdf4Raster;
+from .netcdf4raster import Netcdf4Raster;
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+from .rowtiffraster import RowTiffRaster
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toolbox/copylib.py

+import lmgeo.formats.inmemoryraster as imr
+from lmgeo.formats.raster import Raster
+from lmgeo.formats.gridenvelope2d import GridEnvelope2D
+import numpy as np
+
+def copyToMemory(myraster):
+    # Check input
+    if not isinstance(myraster, Raster):
+        raise Exception("Input is not a raster")
+    if not isinstance(myraster, GridEnvelope2D):
+        raise Exception("Input is not a grid envelope")
+    
+    result = None
+    try:
+        # Get particulars from the input 
+        numpy_type = myraster.get_numpy_type()
+        mydata = np.zeros((myraster.nrows, myraster.ncols), dtype=numpy_type)
+        if numpy_type in [np.int, np.uint16, np.uint32, np.int16, np.int32]:
+            fmt = 'i'
+        else:
+            fmt = 'f'
+        nrows = myraster.nrows
+        ncols = myraster.ncols
+        nodatavalue = myraster.nodatavalue
+        
+        # Use them to initialise a InMemory raster
+        result = imr.InMemoryRaster("C:\dummy_folder\dummyfile.nix", mydata, fmt)
+        if not result.open('w', ncols, nrows, myraster.xll, myraster.yll, myraster.dx, nodatavalue):
+            raise Exception("Unable to initialise InMemoryRaster.")
+        
+        # Now copy the data
+        for i in range(myraster.nrows):
+            line = myraster.next()
+            line.shape = (ncols,)
+            result.data[i,:] = line
+
+    except Exception as e:
+        raise Exception("Error in module copylib: %s" + str(e))
+    finally:
+        result.reset()
+        myraster.reset()
+        return result
+    
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