[GRASS-dev] How to create a vector tile index from GRASS raster maps?

GRASS GRASS developer
1

Hi,

I received DEM data in about 9000 tiles and wanted to generate a tile
index for easy lookup (like gdaltindex does).
Is there anything already available?

thanks,
Markus

2

Markus Neteler wrote

Hi,

I received DEM data in about 9000 tiles and wanted to generate a tile
index for easy lookup (like gdaltindex does).
Is there anything already available?

no idea if there is a raster equivalent in pygrass; what I've done in a
script with pygrass for vectors:

if print_bbox_vector_geometries :
    # open vector
    vtopo = VectorTopo(vector)
    vtopo.open(mode = 'r')
    # loop thru vector geometries
    for i in range(1, vcats_max_plus):
        # get vector geometries area info
        vect_geom_area = Area(v_id = i, c_mapinfo = vtopo.c_mapinfo)
        # get vector geometries bbox info
        vect_geom_bb = vect_geom_area.bbox()
        # bbox north, south, west, east
        bb_north = vect_geom_bb.north
        bb_south = vect_geom_bb.south
        bb_west = vect_geom_bb.west
        bb_east = vect_geom_bb.east
        grass.message("cat %s: north: %s south: %s west: %s east: %s" %(i,
bb_north, bb_south, bb_west, bb_east))
    # close vector
vtopo.close()

maybe then feed back these coordinates in pygrass to build a vector tile
index?

-----
best regards
Helmut
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