| 7 |
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| 8 |
"""Data source abstractions""" |
"""Data source abstractions""" |
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| 10 |
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from __future__ import generators |
| 11 |
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|
| 12 |
__version__ = "$Revision$" |
__version__ = "$Revision$" |
| 13 |
# $Source$ |
# $Source$ |
| 14 |
# $Id$ |
# $Id$ |
| 66 |
ys.append(y) |
ys.append(y) |
| 67 |
return (min(xs), min(ys), max(xs), max(ys)) |
return (min(xs), min(ys), max(xs), max(ys)) |
| 68 |
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| 69 |
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def ShapeID(self): |
| 70 |
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return self.shapeid |
| 71 |
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|
| 72 |
def Points(self): |
def Points(self): |
| 73 |
"""Return the coordinates of the shape as a list of lists of pairs""" |
"""Return the coordinates of the shape as a list of lists of pairs""" |
| 74 |
shape = self.shapefile.read_object(self.shapeid) |
shape = self.shapefile.read_object(self.shapeid) |
| 196 |
""" |
""" |
| 197 |
return self.bbox |
return self.bbox |
| 198 |
|
|
| 199 |
def ShapesInRegion(self, box): |
def ShapesInRegion(self, bbox): |
| 200 |
"""Return the ids of the shapes that overlap the box. |
"""Return an iterable over the shapes that overlap the bounding box. |
| 201 |
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|
| 202 |
Box is a tuple (left, bottom, right, top) in the coordinate |
The bbox parameter should be the bounding box as a tuple in the |
| 203 |
system used used in the shapefile. |
form (minx, miny, maxx, maxy) in the coordinate system of the |
| 204 |
""" |
shape store. |
| 205 |
left, bottom, right, top = box |
""" |
| 206 |
return self.shapetree.find_shapes((left, bottom), (right, top)) |
left, bottom, right, top = bbox |
| 207 |
|
for i in self.shapetree.find_shapes((left, bottom), (right, top)): |
| 208 |
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yield ShapefileShape(self.shapefile, i) |
| 209 |
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|
| 210 |
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def AllShapes(self): |
| 211 |
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"""Return an iterable over the shapes in the shape store.""" |
| 212 |
|
for i in xrange(self.NumShapes()): |
| 213 |
|
yield ShapefileShape(self.shapefile, i) |
| 214 |
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|
| 215 |
def Shape(self, index): |
def Shape(self, index): |
| 216 |
"""Return the shape with index index""" |
"""Return the shape with index index""" |
| 269 |
""" |
""" |
| 270 |
return self.shapestore.ShapesInRegion(bbox) |
return self.shapestore.ShapesInRegion(bbox) |
| 271 |
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|
| 272 |
|
def AllShapes(self): |
| 273 |
|
"""Return an iterable over the shapes in the shape store. |
| 274 |
|
|
| 275 |
|
This method is simply delegated to the shapestore the |
| 276 |
|
DerivedShapeStore was instantiated with. |
| 277 |
|
""" |
| 278 |
|
return self.shapestore.AllShapes() |
| 279 |
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|
| 280 |
def ShapeType(self): |
def ShapeType(self): |
| 281 |
"""Return the type of the shapes in the layer. |
"""Return the type of the shapes in the layer. |
| 282 |
|
|
| 285 |
""" |
""" |
| 286 |
return self.shapestore.ShapeType() |
return self.shapestore.ShapeType() |
| 287 |
|
|
| 288 |
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def RawShapeFormat(self): |
| 289 |
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"""Return the raw data format of the shapes. |
| 290 |
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|
| 291 |
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This method is simply delegated to the shapestore the |
| 292 |
|
DerivedShapeStore was instantiated with. |
| 293 |
|
""" |
| 294 |
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return self.shapestore.RawShapeFormat() |
| 295 |
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| 296 |
def NumShapes(self): |
def NumShapes(self): |
| 297 |
"""Return the number of shapes in the shapestore.""" |
"""Return the number of shapes in the shapestore.""" |
| 298 |
return self.shapestore.NumShapes() |
return self.shapestore.NumShapes() |
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