Linked contour map generation with ODM DEM model

This update links the grass contour code to the ODM project DEM model generated with PDAL, which is located in the project folder /odm_georeferencing/odm_georeferencing_model_dem.tif. 
It also enables contour and relief maps to be created across regions as it ignores the Location PROJ_INFO with the -o flag.

contrib/grass/odm_grass.py

@@ -12,7 +12,6 @@ import grass.script as gscript
 import grass.script.core
 import grass.script.setup
 
-vlidarName = 'odm_vlidar'
 rsurfName = 'odm_rsurf'
 contourName = 'odm_contour'
 orthophotoName = 'odm_orthophoto'
@@ -65,47 +64,25 @@ def main():
     gscript.run_command('g.region', flags='s', n=n, s=s, e=e, w=w, res=0.01,
                         res3=0.01, overwrite=overwrite)
 
-    dem(projectHome)
     contour(projectHome)
     relief(projectHome)
 
     os.remove(gisrc)
 
 
-def dem(projectHome):
-    """
-    Creates a DEM in GeoTIFF format.
-    NB: this is a data raster, not an RGBA raster
-    and so is normally only readable by GIS and not image software.
-    """
-    print 'Creating DEM'
-
-    step = 0.5
-    gscript.run_command('v.in.lidar', flags='beo',
-                        input=projectHome +
-                        '/odm_georeferencing/odm_georeferenced_model.ply.las',
-                        output=vlidarName, overwrite=overwrite)
-
-    gscript.run_command('v.surf.bspline', input=vlidarName,
-                        raster_output=rsurfName,
-                        ew_step=step, ns_step=step, method='bicubic',
-                        memory=4096, overwrite=overwrite)
-
-    gscript.run_command('r.out.gdal', flags='cfm', input=rsurfName,
-                        output=projectHome+'/odm_georeferencing/odm_dem.tif',
-                        format='GTiff', type='Float32',
-                        createopt='TILED=yes,COMPRESS=DEFLATE,PREDICTOR=2,' +
-                        'BLOCKXSIZE=512,BLOCKYSIZE=512', nodata=0,
-                        overwrite=overwrite)
-
-
 def contour(projectHome):
     """
-    Creates a contour map.
+    Creates a contour map based on the ODM project DEM model.
     """
     print 'Creating contour map'
 
     step = 0.25
+    
+    gscript.run_command('r.in.gdal', flags='o',
+                        input=projectHome+'/odm_georeferencing/odm_georeferencing_model_dem.tif',
+                        output=rsurfName, memory=2047,
+                        overwrite=overwrite)
+
     gscript.run_command('r.contour', input=rsurfName, output=contourName,
                         step=step, overwrite=overwrite)
 
@@ -122,7 +99,7 @@ def relief(projectHome):
     """
     print 'Creating relief map'
 
-    gscript.run_command('r.in.gdal', flags='e',
+    gscript.run_command('r.in.gdal', flags='o',
                         input=projectHome+'/odm_orthophoto/odm_orthophoto.tif',
                         output=orthophotoName, memory=2047,
                         overwrite=overwrite)