/[thuban]/branches/WIP-pyshapelib-bramz/Thuban/Model/proj.py
ViewVC logotype

Diff of /branches/WIP-pyshapelib-bramz/Thuban/Model/proj.py

Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

revision 758 by jonathan, Tue Apr 29 09:01:12 2003 UTC revision 1802 by bh, Thu Oct 9 15:18:35 2003 UTC
# Line 1  Line 1 
1  # Copyright (c) 2001 by Intevation GmbH  # Copyright (c) 2001, 2003 by Intevation GmbH
2  # Authors:  # Authors:
3  # Bernhard Herzog <[email protected]>  # Bernhard Herzog <[email protected]>
4  #  #
# Line 15  import Projection Line 15  import Projection
15  BaseProjection = Projection.Projection  BaseProjection = Projection.Projection
16  del Projection  del Projection
17    
18    PROJ_UNITS_METERS  = 1
19    PROJ_UNITS_DEGREES = 2
20    
21  class Projection(BaseProjection):  class Projection(BaseProjection):
22    
23      """A proj4 projection object that remembers the parameters"""      """A proj4 projection object that remembers the parameters"""
# Line 59  class Projection(BaseProjection): Line 62  class Projection(BaseProjection):
62      def GetParameter(self, param):      def GetParameter(self, param):
63          """Return the projection value for the given parameter.          """Return the projection value for the given parameter.
64    
65          If 'param' exists as a valid parameter then the returned          If 'param' exists as a valid parameter return the associated
66          value is a string with that value. If the parameter doesn't          value as a string. If the parameter does not have a value (like
67          exist an empty string is returned.          e.g. the 'south' parameter for utm) then the value is the
68            parameter name itself.
69    
70            If the parameter doesn't exist return an empty string.
71          """          """
72    
73          for pair in self.params:          for pair in self.params:
74              p, v = pair.split("=")              if "=" in pair:
75                    p, v = pair.split("=")
76                else:
77                    p = v = pair
78              if p == param:              if p == param:
79                  return v                  return v
80    
# Line 75  class Projection(BaseProjection): Line 84  class Projection(BaseProjection):
84          """Return list of 'parameter=value' strings"""          """Return list of 'parameter=value' strings"""
85          return self.params          return self.params
86    
87        def GetProjectedUnits(self):
88            if self.GetParameter("proj") == "latlong":
89                return PROJ_UNITS_DEGREES
90            else:
91                return PROJ_UNITS_METERS
92    
93      def __repr__(self):      def __repr__(self):
94          return self.name + ": " + repr(self.params)          return self.name + ": " + repr(self.params)
95    
# Line 91  class ProjFile: Line 106  class ProjFile:
106          self.SetFilename(filename)          self.SetFilename(filename)
107            
108      def Add(self, proj):      def Add(self, proj):
109          """Add the given projection to the end of the file. If 'proj'          """Add the projection to the end of the file."""
110          already exists, it is replaced in the same location as the          self.__projs.append(proj)
         original projection.  
         """  
   
         try:  
             #  
             # see if the projection already exists.  
             # this only works if Projection doesn't override __eq__  
             #  
             self.__projs[self.__projs.index(proj)] = proj  
         except ValueError:  
             self.__projs.append(proj)  
111    
112      def Remove(self, proj):      def Remove(self, proj):
113          """Remove the object proj from the projection file.          """Remove the object proj from the projection file.
Legend:
Removed from v.758  
changed lines
  Added in v.1802
[email protected]
 ViewVC Help
Powered by ViewVC 1.1.26