author | Pawel Solyga <Pawel.Solyga@gmail.com> |
Mon, 18 May 2009 19:37:38 +0200 | |
changeset 2327 | 6c7d0fba105c |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
323
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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1 |
from ctypes import c_double, c_int, c_uint, POINTER |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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2 |
from django.contrib.gis.geos.libgeos import lgeos, GEOM_PTR, CS_PTR |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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3 |
from django.contrib.gis.geos.prototypes.errcheck import last_arg_byref, GEOSException |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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4 |
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ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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5 |
## Error-checking routines specific to coordinate sequences. ## |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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def check_cs_ptr(result, func, cargs): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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7 |
"Error checking on routines that return Geometries." |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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8 |
if not result: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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9 |
raise GEOSException('Error encountered checking Coordinate Sequence returned from GEOS C function "%s".' % func.__name__) |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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10 |
return result |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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11 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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12 |
def check_cs_op(result, func, cargs): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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13 |
"Checks the status code of a coordinate sequence operation." |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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14 |
if result == 0: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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15 |
raise GEOSException('Could not set value on coordinate sequence') |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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16 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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17 |
return result |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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18 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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19 |
def check_cs_get(result, func, cargs): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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20 |
"Checking the coordinate sequence retrieval." |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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21 |
check_cs_op(result, func, cargs) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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22 |
# Object in by reference, return its value. |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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23 |
return last_arg_byref(cargs) |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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24 |
|
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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25 |
## Coordinate sequence prototype generation functions. ## |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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26 |
def cs_int(func): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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27 |
"For coordinate sequence routines that return an integer." |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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func.argtypes = [CS_PTR, POINTER(c_uint)] |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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func.restype = c_int |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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func.errcheck = check_cs_get |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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return func |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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33 |
def cs_operation(func, ordinate=False, get=False): |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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34 |
"For coordinate sequence operations." |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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35 |
if get: |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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36 |
# Get routines get double parameter passed-in by reference. |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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37 |
func.errcheck = check_cs_get |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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38 |
dbl_param = POINTER(c_double) |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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39 |
else: |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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40 |
func.errcheck = check_cs_op |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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41 |
dbl_param = c_double |
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Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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42 |
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ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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43 |
if ordinate: |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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44 |
# Get/Set ordinate routines have an extra uint parameter. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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45 |
func.argtypes = [CS_PTR, c_uint, c_uint, dbl_param] |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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46 |
else: |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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47 |
func.argtypes = [CS_PTR, c_uint, dbl_param] |
ff1a9aa48cfd
Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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48 |
|
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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49 |
func.restype = c_int |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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50 |
return func |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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def cs_output(func, argtypes): |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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"For routines that return a coordinate sequence." |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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func.argtypes = argtypes |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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55 |
func.restype = CS_PTR |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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56 |
func.errcheck = check_cs_ptr |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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57 |
return func |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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59 |
## Coordinate Sequence ctypes prototypes ## |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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61 |
# Coordinate Sequence constructors & cloning. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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62 |
cs_clone = cs_output(lgeos.GEOSCoordSeq_clone, [CS_PTR]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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63 |
create_cs = cs_output(lgeos.GEOSCoordSeq_create, [c_uint, c_uint]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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64 |
get_cs = cs_output(lgeos.GEOSGeom_getCoordSeq, [GEOM_PTR]) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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65 |
|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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66 |
# Getting, setting ordinate |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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67 |
cs_getordinate = cs_operation(lgeos.GEOSCoordSeq_getOrdinate, ordinate=True, get=True) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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68 |
cs_setordinate = cs_operation(lgeos.GEOSCoordSeq_setOrdinate, ordinate=True) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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69 |
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ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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70 |
# For getting, x, y, z |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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71 |
cs_getx = cs_operation(lgeos.GEOSCoordSeq_getX, get=True) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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72 |
cs_gety = cs_operation(lgeos.GEOSCoordSeq_getY, get=True) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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73 |
cs_getz = cs_operation(lgeos.GEOSCoordSeq_getZ, get=True) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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74 |
|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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75 |
# For setting, x, y, z |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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76 |
cs_setx = cs_operation(lgeos.GEOSCoordSeq_setX) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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77 |
cs_sety = cs_operation(lgeos.GEOSCoordSeq_setY) |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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78 |
cs_setz = cs_operation(lgeos.GEOSCoordSeq_setZ) |
ff1a9aa48cfd
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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79 |
|
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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80 |
# These routines return size & dimensions. |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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81 |
cs_getsize = cs_int(lgeos.GEOSCoordSeq_getSize) |
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Pawel Solyga <Pawel.Solyga@gmail.com>
parents:
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82 |
cs_getdims = cs_int(lgeos.GEOSCoordSeq_getDimensions) |