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124e26815d
* Use portable /usr/bin/env/{perl,python} instead of /usr/bin/{perl,python}
* fix perl;add bash
* Fix indentation using modified scripts
* Revert "fix perl;add bash"
This reverts commit be8b9113c25f7c2fb9c8c9bad556fbca2f0c0ba2.
* python3 everywhere
* more bash
* rebase
change perl
* Linux perl; missing from last PR
* fix doxygen_space
* Use portable /usr/bin/env/{perl,python} instead of /usr/bin/{perl,python}
* fix perl;add bash
* Fix indentation using modified scripts
* Revert "fix perl;add bash"
This reverts commit be8b9113c25f7c2fb9c8c9bad556fbca2f0c0ba2.
* python3 everywhere
* more bash
* rebase
change perl
* fix doxygen_space
119 lines
4.0 KiB
Python
Executable File
119 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# Generates random shapefile which may be used for benchmarks
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import os
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import sys
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import random
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import string
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import math
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from osgeo import ogr
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from optparse import OptionParser
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def error(msg):
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print(msg)
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sys.exit(1)
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parser = OptionParser("usage: %prog [options] output")
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parser.add_option("-t", "--type", dest="type", type="choice", choices=("point", "line", "polygon"), default="point", help="Geometry type")
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parser.add_option("-f", "--features", dest="features", type="int", default=1000, help="Number of features")
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parser.add_option("-c", "--coordinates", dest="coordinates", type="int", default=10, help="Number of coordinates per feature (lines and polygons)")
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parser.add_option("-a", "--attributes", dest="attributes", type="int", default=10, help="Number of attributes")
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parser.add_option("-e", "--extent", dest="extent", type="string", default="-180,-90,180,90", help="Extent")
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(options, args) = parser.parse_args()
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if len(args) != 1:
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error("Output file path missing")
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(minx, miny, maxx, maxy) = map(float, options.extent.split(","))
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driverName = "ESRI Shapefile"
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drv = ogr.GetDriverByName(driverName)
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if drv is None:
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error("%s driver not available.\n" % driverName)
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# delete if exists
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try:
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if os.path.exists(args[0]):
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drv.DeleteDataSource(args[0])
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except:
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pass
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ds = drv.CreateDataSource(args[0])
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if ds is None:
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error("Creation of output file failed.\n")
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types = {"point": ogr.wkbPoint, "line": ogr.wkbLineString, "polygon": ogr.wkbPolygon}
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lyr = ds.CreateLayer("out", None, types[options.type])
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if lyr is None:
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error("Layer creation failed.\n")
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attrTypes = (ogr.OFTString, ogr.OFTInteger, ogr.OFTReal)
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stringWidth = 100
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for a in range(0, options.attributes):
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attrName = "attr%s" % a
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field_defn = ogr.FieldDefn(attrName, random.choice(attrTypes))
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if field_defn.type == ogr.OFTString:
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field_defn.SetWidth(stringWidth)
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if lyr.CreateField(field_defn) != 0:
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error("Creating Name field failed.\n")
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feat_defn = lyr.GetLayerDefn()
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for f in range(options.features):
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feat = ogr.Feature(feat_defn)
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buffer = (maxx - minx) / 100
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if options.type == "point":
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geo = ogr.Geometry(ogr.wkbPoint)
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x = random.uniform(minx, maxx)
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y = random.uniform(miny, maxy)
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geo.SetPoint_2D(0, x, y)
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elif options.type == "line":
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geo = ogr.Geometry(ogr.wkbLineString)
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xc = random.uniform(minx + buffer, maxx - buffer)
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yc = random.uniform(miny + buffer, maxy - buffer)
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for c in range(options.coordinates):
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a = c * 2 * math.pi / options.coordinates
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r = random.uniform(buffer / 10, 9 * buffer / 10)
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x = xc + r * math.sin(a)
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y = yc + r * math.cos(a)
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geo.SetPoint_2D(c, x, y)
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elif options.type == "polygon":
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ring = ogr.Geometry(ogr.wkbLinearRing)
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xc = random.uniform(minx + buffer, maxx - buffer)
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yc = random.uniform(miny + buffer, maxy - buffer)
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for c in range(options.coordinates):
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a = c * 2 * math.pi / options.coordinates
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r = random.uniform(buffer / 10, 9 * buffer / 10)
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x = xc + r * math.sin(a)
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y = yc + r * math.cos(a)
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ring.SetPoint_2D(c, x, y)
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geo = ogr.Geometry(ogr.wkbPolygon)
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geo.AddGeometry(ring)
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feat.SetGeometry(geo)
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for i in range(feat_defn.GetFieldCount()):
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field_defn = feat_defn.GetFieldDefn(i)
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val = None
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limit = 10000000
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if field_defn.GetType() == ogr.OFTString:
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nChars = random.randint(0, stringWidth)
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val = ''.join(random.choice(string.ascii_letters + string.digits) for x in range(nChars))
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elif field_defn.GetType() == ogr.OFTInteger:
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val = random.randint(-limit, limit)
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elif field_defn.GetType() == ogr.OFTReal:
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val = random.uniform(-limit, limit)
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feat.SetField(field_defn.name, val)
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if lyr.CreateFeature(feat) != 0:
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error("Failed to create feature in shapefile.\n")
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