[GRASS-SVN] r64337 - grass-addons/grass7/raster/r.in.proj

svn_grass at osgeo.org svn_grass at osgeo.org
Tue Jan 27 12:08:58 PST 2015


Author: mmetz
Date: 2015-01-27 12:08:58 -0800 (Tue, 27 Jan 2015)
New Revision: 64337

Added:
   grass-addons/grass7/raster/r.in.proj/Makefile
   grass-addons/grass7/raster/r.in.proj/r.in.proj.html
   grass-addons/grass7/raster/r.in.proj/r.in.proj.py
Log:
r.in.proj: import reproject at once

Added: grass-addons/grass7/raster/r.in.proj/Makefile
===================================================================
--- grass-addons/grass7/raster/r.in.proj/Makefile	                        (rev 0)
+++ grass-addons/grass7/raster/r.in.proj/Makefile	2015-01-27 20:08:58 UTC (rev 64337)
@@ -0,0 +1,7 @@
+MODULE_TOPDIR = ../..
+
+PGM = r.in.proj
+
+include $(MODULE_TOPDIR)/include/Make/Script.make
+
+default: script


Property changes on: grass-addons/grass7/raster/r.in.proj/Makefile
___________________________________________________________________
Added: svn:mime-type
   + text/x-sh
Added: svn:keywords
   + Id
Added: svn:eol-style
   + native

Added: grass-addons/grass7/raster/r.in.proj/r.in.proj.html
===================================================================
--- grass-addons/grass7/raster/r.in.proj/r.in.proj.html	                        (rev 0)
+++ grass-addons/grass7/raster/r.in.proj/r.in.proj.html	2015-01-27 20:08:58 UTC (rev 64337)
@@ -0,0 +1,48 @@
+<h2>DESCRIPTION</h2>
+
+<em>r.in.proj</em> imports selected bands froma GDAL raster datasouce 
+into the current location and mapset. If the projection of the input 
+does not match the projection of the location, the input is reprojected 
+into the current location. If the projection of the input does match 
+the projection of the location, the input is imported directly with <a 
+href="r.in.gdal.html">r.in.gdal</a>.
+
+<h4>Resolution</h4>
+<em>r.in.proj</em> reports the estimated target resolution for each 
+input band. The estimated resolution will usually be some floating 
+point number, e.g. 271.301. The target resolution should be the rounded 
+estimated resolution, e.g. 250 or 300 instead of 271.301. For latlong 
+locations, the resolution might be set to arc seconds, e.g. 1, 3, 7.5, 
+15, and 30 arc seconds are commonly used resolutions.
+
+<h4>Resampling methods</h4>
+<b>nearest</b> is the simplest method and the only possible method for 
+categorical data.
+<p>
+<b>bilinear</b> does linear interpolation and provides smoother output 
+than <b>nearest</b>. <b>bilinear</b> is recommended when reprojecting a 
+DEM for hydrological analysis or for surfaces where overshoots must be 
+avoided, e.g. precipitation should not become negative. 
+<p> 
+<b>bicubic</b> produces smoother output than <b>bilinear</b>, at 
+the cost of overshoots. 
+<p>
+<b>lanczos</b> produces the smoothest output of all methods and 
+preserves contrast best. <b>lanczos</b> is recommended for imagery. 
+Both <b>bicubic</b> and <b>lanczos</b> preserve linear features. With 
+<b>nearest</b> or <b>bilinear</b>, linear features can become zigzag 
+features after reprojection.
+
+
+<h2>SEE ALSO</h2>
+
+<em>
+<a href="r.in.gdal.html">r.in.gdal</a>,<br>
+<a href="r.proj.html">r.proj</a>
+</em>
+
+<h2>AUTHORS</h2>
+
+Markus Metz<br>
+
+<p><i>Last changed: $Date: 2015-01-20 20:52:27 +0100 (Tue, 20 Jan 2015) $</i>


Property changes on: grass-addons/grass7/raster/r.in.proj/r.in.proj.html
___________________________________________________________________
Added: svn:mime-type
   + text/html
Added: svn:keywords
   + Id
Added: svn:eol-style
   + native

Added: grass-addons/grass7/raster/r.in.proj/r.in.proj.py
===================================================================
--- grass-addons/grass7/raster/r.in.proj/r.in.proj.py	                        (rev 0)
+++ grass-addons/grass7/raster/r.in.proj/r.in.proj.py	2015-01-27 20:08:58 UTC (rev 64337)
@@ -0,0 +1,324 @@
+#!/usr/bin/env python
+
+############################################################################
+#
+# MODULE:       r.in.proj
+#
+# AUTHOR(S):    Markus Metz
+#
+# PURPOSE:      Import and reproject on the fly
+#
+# COPYRIGHT:    (C) 2015 GRASS development team
+#
+#               This program is free software under the GNU General
+#               Public License (>=v2). Read the file COPYING that
+#               comes with GRASS for details.
+#
+#############################################################################
+
+#%module
+#% description: Import raster data using GDAL library and reproject on the fly.
+#% keyword: raster
+#% keyword: import
+#% keyword: projection
+#%end
+#%option G_OPT_F_INPUT
+#% key: input_file
+#% required: no
+#% multiple: no
+#% description: Name of GDAL dataset (file) to be imported
+#% guisection: Input
+#%end
+#%option G_OPT_M_DIR
+#% key: input_directory
+#% required: no
+#% multiple: no
+#% description: Name of GDAL dataset (directory) to be imported
+#% guisection: Input
+#%end
+#%option
+#% key: band
+#% type: integer
+#% required: no
+#% multiple: yes
+#% description: Input band(s) to select (default is all bands)
+#% guisection: Input
+#%end
+#%option
+#% key: memory
+#% type: integer
+#% required: no
+#% multiple: no
+#% options: 0-2047
+#% label: Maximum memory to be used (in MB)
+#% description: Cache size for raster rows
+#% answer: 300
+#%end
+#%option G_OPT_R_OUTPUT
+#% required: no
+#% multiple: no
+#% key_desc: name
+#% description: Name for output raster map (default: same as 'input')
+#% guisection: Output
+#%end
+#%option
+#% key: resample
+#% type: string
+#% required: yes
+#% multiple: no
+#% options: nearest,bilinear,bicubic,lanczos,bilinear_f,bicubic_f,lanczos_f
+#% description: Resampling method to use for reprojection
+#% descriptions: nearest;nearest neighbor;bilinear;bilinear interpolation;bicubic;bicubic interpolation;lanczos;lanczos filter;bilinear_f;bilinear interpolation with fallback;bicubic_f;bicubic interpolation with fallback;lanczos_f;lanczos filter with fallback
+#% guisection: Output
+#%end
+#%option
+#% key: extents
+#% type: string
+#% required: yes
+#% multiple: no
+#% options: region,input
+#% description: Ouput raster map extents
+#% descriptions: region;extents of current region;input;extents of input map
+#% guisection: Output
+#%end
+#%option
+#% key: resolution
+#% type: double
+#% required: no
+#% multiple: no
+#% description: Resolution of output raster map (default: current region)
+#% guisection: Output
+#%end
+#%flag
+#% key: i
+#% description: Import and reproject (default: estimate resolution only)
+#% guisection: Output
+#%end
+
+
+import sys
+import os
+import shutil
+import atexit
+import math
+
+import grass.script as grass
+
+    
+def cleanup():
+    # remove temp location
+    if tmploc:
+        path = os.path.join(gisdbase, tmploc)
+        grass.try_rmdir(path)
+    if srcgisrc:
+        grass.try_remove(srcgisrc)
+
+def main():
+    global tmploc, srcgisrc, gisdbase
+
+    output = options['output']
+    method = options['resample']
+    memory = options['memory']
+    do_import = flags['i']
+
+    bands = None
+    if options['band']:
+        bands = options['band']
+    tgtres = None
+    if options['resolution']:
+        tgtres = options['resolution']
+
+    # initialize global vars
+    tmploc = None
+    srcgisrc = None
+    gisdbase = None
+
+    # make sure current location is not xy
+    if grass.parse_command('g.proj', flags = 'g')['name'] == 'xy_location_unprojected':
+        grass.fatal(_("The current location is a XY location (unprojected)"))
+        sys.exit(1)
+        
+
+    GDALdatasource = None
+    if options['input_file']:
+        GDALdatasource = options['input_file']
+    
+    if not GDALdatasource:
+        GDALdatasource = options['input_directory']
+
+    if not GDALdatasource:
+        grass.fatal(_("Either option 'input_file' or option 'input_directory' must be given"))
+
+    # TODO: check if input is a dataset recognized by GDAL */
+
+    # compare output of g.proj -j and g.proj -j georef=GDALdatasource
+    insrs = grass.read_command('g.proj', flags = 'j', georef = GDALdatasource, quiet = True)
+    tgtsrs = grass.read_command('g.proj', flags = 'j', quiet = True)
+
+    if insrs == tgtsrs:
+        # try r.in.gdal directly
+        grass.message(_("Trying direct import of <%s>...") % GDALdatasource) 
+        ps = grass.start_command('r.in.gdal', input = GDALdatasource,
+                                band = bands, output = output,
+                                memory = memory, flags = 'k')
+        returncode = ps.wait()
+        
+        # if it succeeds, return
+        if returncode == 0:
+            grass.message(_("Input <%s> successfully imported without reprojection") % GDALdatasource) 
+            sys.exit(0)
+
+    grassenv = grass.gisenv()
+    tgtloc = grassenv['LOCATION_NAME']
+    tgtmapset = grassenv['MAPSET']
+    gisdbase = grassenv['GISDBASE']
+    tgtgisrc = os.environ['GISRC']
+    srcgisrc = grass.tempfile()
+    
+    tmploc = 'temp_import_location_' + str(os.getpid())
+
+    # r.in.gdal with location=temp location
+    grass.message(_("Importing <%s> ...") % GDALdatasource) 
+    ps = grass.start_command('r.in.gdal', input = GDALdatasource,
+                             band = bands, output = output,
+                             memory = memory, flags = 'k',
+                             location = tmploc)
+    returncode = ps.wait()
+    
+    # if it fails, return
+    if returncode != 0:
+        grass.fatal(_("Unable to import GDAL dataset <%s>") % GDALdatasource)
+        sys.exit(0)
+
+    f = open(srcgisrc, 'w')
+    f.write('DEBUG: 0\n')
+    f.write('MAPSET: PERMANENT\n')
+    f.write('GISDBASE: %s\n' % gisdbase)
+    f.write('LOCATION_NAME: %s\n' % tmploc);
+    f.write('GUI: text\n')
+    f.close()
+    
+    # switch to temp location
+    os.environ['GISRC'] = str(srcgisrc)
+    outfiles = grass.list_grouped('rast')['PERMANENT']
+
+    # make sure input is not xy
+    if grass.parse_command('g.proj', flags = 'g')['name'] == 'xy_location_unprojected':
+        grass.fatal(_("Coordinate reference system not available for input <%s>") % GDALdatasource)
+        sys.exit(1)
+
+    # is output a group?
+    group = False
+    path = os.path.join(gisdbase, tmploc, 'group', output)
+    if os.path.exists(path):
+        group = True
+        path = os.path.join(gisdbase, tmploc, 'group', output, 'POINTS')
+        if os.path.exists(path):
+            grass.fatal(_("Input contains GCPs, rectification is required"))
+            sys.exit(1)
+
+    # switch to target location
+    os.environ['GISRC'] = str(tgtgisrc)
+
+    if tgtres is not None and float(tgtres) <= 0:
+        tgtres = None
+
+    region = grass.region()
+    
+    if tgtres is not None:
+        outres = tgtres
+    else:
+        outres = (region['ewres'] + region['nsres']) / 2.0
+
+    rflags = None
+    if options['extents'] == 'input':
+        rflags = 'n'
+
+    for outfile in outfiles:
+
+        n = region['n']
+        s = region['s']
+        e = region['e']
+        w = region['w']
+
+        if options['extents'] == 'input':
+            # r.proj -g
+            try:
+                tgtextents = grass.read_command('r.proj', location = tmploc,
+                                                mapset = 'PERMANENT',
+                                                input = outfile, flags = 'g',
+                                                memory = memory)
+            except:
+                grass.fatal(_("Unable to get reprojected map extents"))
+                sys.exit(1)
+            
+            srcregion = grass.parse_key_val(tgtextents, vsep = ' ')
+            n = srcregion['n']
+            s = srcregion['s']
+            e = srcregion['e']
+            w = srcregion['w']
+            
+        grass.use_temp_region()
+
+        grass.run_command('g.region', n = n, s = s, e = e, w = w)
+        
+        # v.in.region in tgt
+        vreg = 'vreg_' + str(os.getpid())
+        grass.run_command('v.in.region', output = vreg, quiet = True)
+        
+        grass.del_temp_region()
+
+        # reproject to src
+        # switch to temp location
+        os.environ['GISRC'] = str(srcgisrc)
+        ps = grass.start_command('v.proj', input = vreg, output = vreg, 
+                          location = tgtloc, mapset = tgtmapset, quiet = True)
+        returncode = ps.wait()
+        if returncode != 0:
+            grass.fatal(_("Unable to to reproject to source location"))
+            sys.exit(1)
+        
+        # set region from region vector
+        grass.run_command('g.region', raster = outfile)
+        grass.run_command('g.region', vector = vreg)
+        # align to fist band
+        grass.run_command('g.region', align = outfile)
+        # get number of cells
+        cells = grass.region()['cells']
+        
+        # resolution = sqrt((n - s) * (e - w) / cells)
+        estres = math.sqrt((n - s) * (e - w) / cells)
+
+        os.environ['GISRC'] = str(tgtgisrc)
+        grass.run_command('g.remove', type = 'vector', name = vreg,
+                          flags = 'f', quiet = True)
+        
+        grass.message(_("Estimated target resolution for input band <%s>: %g") % (outfile, estres))
+        grass.message(_("Specified target resolution: %g") % outres)
+
+        if do_import:
+            # r.proj
+            grass.message(_("Reprojecting <%s>...") % outfile)
+            ps = grass.start_command('r.proj', location = tmploc,
+                                     mapset = 'PERMANENT', input = outfile,
+                                     method = method, resolution = tgtres,
+                                     memory = memory, flags = rflags, quiet = True)
+            returncode = ps.wait()
+            if returncode != 0:
+                grass.fatal(_("Unable to to reproject raster <%s>") % outfile)
+                sys.exit(1)
+                
+            if grass.raster_info(outfile)['min'] is None:
+                grass.fatal(_("The reprojected raster <%s> is empty") % outfile)
+                sys.exit(1)
+
+
+    if do_import:
+        if group:
+            grass.run_command('i.group', group = output, input = ','.join(outfiles)) 
+
+
+if __name__ == "__main__":
+    options, flags = grass.parser()
+    atexit.register(cleanup)
+    main()


Property changes on: grass-addons/grass7/raster/r.in.proj/r.in.proj.py
___________________________________________________________________
Added: svn:executable
   + *
Added: svn:mime-type
   + text/x-python
Added: svn:keywords
   + Id
Added: svn:eol-style
   + native



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