| 1 | """Functionality for aggregation of points files |
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| 2 | |
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| 3 | Ole Nielsen, Stephen Roberts, Duncan Gray |
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| 4 | Geoscience Australia, 2005. |
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| 5 | """ |
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| 6 | |
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| 7 | from anuga.utilities.polygon import outside_polygon, inside_polygon |
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| 8 | from Numeric import take, concatenate |
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| 9 | import time |
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| 10 | |
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| 11 | import exceptions |
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| 12 | class AttributeError(exceptions.Exception): pass |
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| 13 | |
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| 14 | def combine_rectangular_points_files(fine_points_file, |
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| 15 | coarse_points_file, |
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| 16 | output_points_file, |
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| 17 | verbose = False): |
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| 18 | """Add two point files by the union of the fine and coarse points. |
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| 19 | |
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| 20 | Course points that are in the extent of the fine points are removed. |
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| 21 | |
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| 22 | The extent of the fine points file is assumed to be a rectangle, parallel |
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| 23 | to the x and y axis. |
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| 24 | """ |
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| 25 | |
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| 26 | from load_mesh.loadASCII import import_points_file, extent, point_atts2array, export_points_file, add_point_dictionaries, take_points |
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| 27 | |
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| 28 | |
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| 29 | # load fine points file |
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| 30 | if verbose: print "loading Point files" |
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| 31 | fine = import_points_file(fine_points_file) |
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| 32 | |
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| 33 | # load course points file |
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| 34 | coarse = import_points_file(coarse_points_file) |
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| 35 | |
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| 36 | if verbose: print "doing other stuff" |
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| 37 | # convert to Numeric |
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| 38 | fine = point_atts2array(fine) |
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| 39 | coarse = point_atts2array(coarse) |
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| 40 | |
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| 41 | #check that the attribute info is the same |
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| 42 | #FIXME is not sorting this a problem? |
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| 43 | if not fine['attributelist'].keys() == coarse['attributelist'].keys(): |
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| 44 | raise AttributeError |
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| 45 | |
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| 46 | # set points to the same geo ref - say the fine points geo ref |
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| 47 | if fine.has_key('geo_reference')and not fine['geo_reference'] is None: |
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| 48 | if coarse.has_key('geo_reference'): |
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| 49 | coarse['pointlist'] = \ |
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| 50 | fine['geo_reference'].change_points_geo_ref(coarse['pointlist'], |
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| 51 | points_geo_ref=coarse['geo_reference']) |
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| 52 | # find extent of course points |
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| 53 | extent = extent(fine['pointlist']) |
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| 54 | |
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| 55 | # find out_points - coarse points outside of fine points extent |
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| 56 | |
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| 57 | if verbose: |
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| 58 | print "starting outside_polygon" |
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| 59 | t0 = time.time() |
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| 60 | outside_coarse_indices = outside_polygon(coarse['pointlist'], |
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| 61 | extent, closed=True) |
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| 62 | if verbose: |
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| 63 | print "Points outside determined" |
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| 64 | print 'That took %.2f seconds' %(time.time()-t0) |
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| 65 | |
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| 66 | # Remove points from the coarse data |
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| 67 | coarse = take_points(coarse, outside_coarse_indices) |
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| 68 | |
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| 69 | # add fine points and out_points |
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| 70 | if verbose: print "Adding points" |
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| 71 | combined = add_point_dictionaries(fine, coarse) |
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| 72 | |
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| 73 | # save |
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| 74 | if verbose: print "writing points" |
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| 75 | export_points_file(output_points_file, combined) |
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| 76 | |
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| 77 | def add_points_files(fine_points_file, |
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| 78 | coarse_points_file, |
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| 79 | output_points_file, |
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| 80 | verbose = False): |
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| 81 | """ |
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| 82 | """ |
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| 83 | |
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| 84 | from load_mesh.loadASCII import import_points_file, extent, point_atts2array, export_points_file, add_point_dictionaries,take_points |
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| 85 | |
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| 86 | |
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| 87 | # load fine points file |
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| 88 | if verbose:print "loading Point files" |
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| 89 | try: |
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| 90 | fine = import_points_file(fine_points_file,delimiter = ',') |
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| 91 | except SyntaxError,e: |
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| 92 | fine = import_points_file(fine_points_file,delimiter = ' ') |
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| 93 | |
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| 94 | |
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| 95 | # load course points file |
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| 96 | try: |
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| 97 | coarse = import_points_file(coarse_points_file, |
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| 98 | delimiter = ',') |
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| 99 | except SyntaxError,e: |
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| 100 | coarse = import_points_file(coarse_points_file, |
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| 101 | delimiter = ' ') |
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| 102 | |
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| 103 | if verbose:print "doing other stuff" |
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| 104 | # convert to Numeric |
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| 105 | fine = point_atts2array(fine) |
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| 106 | coarse = point_atts2array(coarse) |
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| 107 | |
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| 108 | #check that the attribute info is the same |
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| 109 | #FIXME is not sorting this a problem? |
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| 110 | if not fine['attributelist'].keys() == coarse['attributelist'].keys(): |
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| 111 | raise AttributeError |
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| 112 | |
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| 113 | # set points to the same geo ref - say the fine points geo ref |
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| 114 | if fine.has_key('geo_reference')and not fine['geo_reference'] is None: |
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| 115 | if coarse.has_key('geo_reference'): |
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| 116 | coarse['pointlist'] = \ |
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| 117 | fine['geo_reference'].change_points_geo_ref(coarse['pointlist'], |
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| 118 | points_geo_ref=coarse['geo_reference']) |
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| 119 | |
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| 120 | # add fine points and out_points |
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| 121 | if verbose: print "Adding points" |
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| 122 | combined = add_point_dictionaries(fine, coarse) |
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| 123 | |
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| 124 | # save |
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| 125 | if verbose: print "writing points" |
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| 126 | export_points_file(output_points_file, combined) |
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| 127 | |
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| 128 | def reduce_points_to_mesh_extent(points_file, |
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| 129 | mesh_file, |
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| 130 | output_points_file, |
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| 131 | verbose = False): |
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| 132 | """ |
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| 133 | """ |
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| 134 | |
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| 135 | from load_mesh.loadASCII import import_points_file, extent, point_atts2array, export_points_file, add_point_dictionaries,take_points, import_mesh_file |
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| 136 | |
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| 137 | |
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| 138 | # load points file |
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| 139 | try: |
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| 140 | points = import_points_file(points_file,delimiter = ',') |
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| 141 | except SyntaxError,e: |
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| 142 | points = import_points_file(points_file,delimiter = ' ') |
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| 143 | |
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| 144 | # load mesh file |
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| 145 | mesh = import_mesh_file(mesh_file) |
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| 146 | |
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| 147 | # get extent of mesh |
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| 148 | extent = extent(mesh['vertices']) |
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| 149 | #print "extent",extent |
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| 150 | # set points to the same geo ref - the points geo ref |
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| 151 | if points.has_key('geo_reference')and not points['geo_reference'] is None: |
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| 152 | if mesh.has_key('geo_reference'): |
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| 153 | extent = \ |
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| 154 | points['geo_reference'].change_points_geo_ref(extent, |
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| 155 | points_geo_ref=mesh['geo_reference']) |
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| 156 | #print "extent",extent |
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| 157 | |
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| 158 | inside_indices = inside_polygon(points['pointlist'], |
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| 159 | extent, closed=True) |
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| 160 | #create a list of in points |
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| 161 | points = take_points(points, inside_indices) |
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| 162 | |
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| 163 | # save the list, along with geo-ref |
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| 164 | export_points_file(output_points_file,points) |
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| 165 | |
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| 166 | #------------------------------------------------------------- |
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| 167 | if __name__ == "__main__": |
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| 168 | """ |
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| 169 | Load in two data points files. |
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| 170 | Save a new points file. |
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| 171 | """ |
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| 172 | import os, sys |
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| 173 | usage = "usage: %s fine_input.pts coarse_input.pts output.pts " \ |
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| 174 | %os.path.basename(sys.argv[0]) |
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| 175 | |
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| 176 | if len(sys.argv) < 4: |
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| 177 | print usage |
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| 178 | else: |
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| 179 | fine_file = sys.argv[1] |
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| 180 | coarse_file = sys.argv[2] |
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| 181 | output_file = sys.argv[3] |
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| 182 | |
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| 183 | combine_rectangular_points_files(fine_file, |
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| 184 | coarse_file, |
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| 185 | output_file) |
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