This repository was archived by the owner on Sep 9, 2020. It is now read-only.
This repository was archived by the owner on Sep 9, 2020. It is now read-only.
asc2hasc fails with rasters with CRS EPSG:4326 and/or with non-square pixels #36
Description
With the following image I get "numpy.linalg.linalg.LinAlgError: Matrix is singular" error
Driver: GTiff/GeoTIFF
Files: sagama20160824_ros.tif
sagama20160824_ros.tif.aux.xml
Size is 139, 115
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (8.520520469873661,40.293932069181139)
Pixel Size = (0.000898315284120,-0.000898315284120)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 8.5205205, 40.2939321) ( 8d31'13.87"E, 40d17'38.16"N)
Lower Left ( 8.5205205, 40.1906258) ( 8d31'13.87"E, 40d11'26.25"N)
Upper Right ( 8.6453863, 40.2939321) ( 8d38'43.39"E, 40d17'38.16"N)
Lower Right ( 8.6453863, 40.1906258) ( 8d38'43.39"E, 40d11'26.25"N)
Center ( 8.5829534, 40.2422789) ( 8d34'58.63"E, 40d14'32.20"N)
Input square cell area : 8.069703494680006e-07
Hexagon cell area : 9.151043762967126e-07
Hexagon side length : 0.0005934844889809739
Hexagon perpendicular : 0.0005139726442095491
Number of rows in mesh : 101
Number of columns in mesh : 141
Converting with Multi-quadratic interpolation ...
/usr/lib/python3/dist-packages/scipy/linalg/basic.py:223: RuntimeWarning: scipy.linalg.solve
Ill-conditioned matrix detected. Result is not guaranteed to be accurate.
Reciprocal condition number: 9.251858537656306e-18
' condition number: {}'.format(rcond), RuntimeWarning)
Traceback (most recent call last):
File "/usr/local/bin/asc2hasc", line 7, in <module>
from hex_utils.asc2hasc import main
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc2hasc.py", line 109, in <module>
main()
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc2hasc.py", line 100, in main
hexRaster.set(i, j, interpol(x, y))
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc.py", line 137, in interpolMultiquadratic
f = interpolate.Rbf(xx, yy, vals, epsilon=epsilon)
File "/usr/lib/python3/dist-packages/scipy/interpolate/rbf.py", line 222, in __init__
self.nodes = linalg.solve(self.A, self.di)
File "/usr/lib/python3/dist-packages/scipy/linalg/basic.py", line 219, in solve
raise LinAlgError('Matrix is singular.')
numpy.linalg.linalg.LinAlgError: Matrix is singular.
With the following image (that is the EPSG:32632 reprojection of the one above) I have "TypeError: '<=' not supported between instances of 'NoneType' and 'int'" error
Driver: GTiff/GeoTIFF
Files: sagama20160824_ros_32632.tif
Size is 139, 116
Coordinate System is:
PROJCS["WGS 84 / UTM zone 32N",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4326"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",9],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["Easting",EAST],
AXIS["Northing",NORTH],
AUTHORITY["EPSG","32632"]]
Origin = (459185.728300000017043,4460491.910400000400841)
Pixel Size = (76.796454676259017,-99.279828448282103)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 459185.728, 4460491.910) ( 8d31'11.25"E, 40d17'38.14"N)
Lower Left ( 459185.728, 4448975.450) ( 8d31'13.89"E, 40d11'24.63"N)
Upper Right ( 469860.436, 4460491.910) ( 8d38'43.38"E, 40d17'39.78"N)
Lower Right ( 469860.436, 4448975.450) ( 8d38'45.33"E, 40d11'26.26"N)
Center ( 464523.082, 4454733.680) ( 8d34'58.46"E, 40d14'32.27"N)
Error, malformed file. Expected cellsize but read dx
Traceback (most recent call last):
File "/usr/local/bin/asc2hasc", line 7, in <module>
from hex_utils.asc2hasc import main
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc2hasc.py", line 109, in <module>
main()
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc2hasc.py", line 56, in main
esriGrid.loadFromFile(args.inputFile)
File "/usr/local/lib/python3.6/dist-packages/hex_utils/raster.py", line 86, in loadFromFile
self._loadHeader()
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc.py", line 148, in _loadHeader
self._set_size( self._loadHeaderLine(self._file.readline(), self._key_size, type(1.0)))
File "/usr/local/lib/python3.6/dist-packages/hex_utils/asc.py", line 36, in _set_size
if (size <= 0):
TypeError: '<=' not supported between instances of 'NoneType' and 'int'
I have to reproject the EPSG:4326 image into a map projection like EPSG:32632 and then warp it to make square pixels to be able to run asc2hasc with both interpolations successfully.
I've used:
gdalwarp -tr 10.0 -10.0 -r bilinear sagama20160824_ros_32632.tif sagama20160824_ros_32632_squared.tif
Driver: GTiff/GeoTIFF
Files: sagama20160824_ros_32632_squared.tif
Size is 1067, 1154
Coordinate System is:
PROJCS["WGS 84 / UTM zone 32N",
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4326"]],
PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",0],
PARAMETER["central_meridian",9],
PARAMETER["scale_factor",0.9996],
PARAMETER["false_easting",500000],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["Easting",EAST],
AXIS["Northing",NORTH],
AUTHORITY["EPSG","32632"]]
Origin = (459185.728300000017043,4460491.910400000400841)
Pixel Size = (10.000000000000000,-10.000000000000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left ( 459185.728, 4460491.910) ( 8d31'11.25"E, 40d17'38.14"N)
Lower Left ( 459185.728, 4448951.910) ( 8d31'13.89"E, 40d11'23.87"N)
Upper Right ( 469855.728, 4460491.910) ( 8d38'43.18"E, 40d17'39.78"N)
Lower Right ( 469855.728, 4448951.910) ( 8d38'45.13"E, 40d11'25.49"N)
Center ( 464520.728, 4454721.910) ( 8d34'58.36"E, 40d14'31.88"N)
Geometries:
Input square cell area : 100.0
Hexagon cell area : 113.39999999999999
Hexagon side length : 6.606639111585838
Hexagon perpendicular : 5.72151730426919
Number of rows in mesh : 1009
Number of columns in mesh : 1077
Converting with Multi-quadratic interpolation ...
Finished successfully.