Thuban/Model/proj.py

# Copyright (c) 2001 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

__version__ = "$Revision$"

import Projection
BaseProjection = Projection.Projection
del Projection

class Projection(BaseProjection):

    """A proj4 projection object that remembers the parameters"""

    def __init__(self, params, name = "Unknown"):
        BaseProjection.__init__(self, params)
        self.params = params
        self.name = name

    def ForwardBBox(self, bbox):
        """Return the bounding box of the corners of the bounding box bbox
        """
        # This is not really the correct way to determine the bbox of a
        # projected shape, but for now it works well enough
        llx, lly, urx, ury = bbox
        xs = []; ys = []
        x, y = self.Forward(llx, lly)
        xs.append(x); ys.append(y)
        x, y = self.Forward(llx, ury)
        xs.append(x); ys.append(y)
        x, y = self.Forward(urx, ury)
        xs.append(x); ys.append(y)
        x, y = self.Forward(urx, lly)
        xs.append(x); ys.append(y)
        return min(xs), min(ys), max(xs), max(ys)

    def GetName(self):
        return self.name

    def GetParameter(self, param):

        for pair in self.params:
            p, v = pair.split("=")
            if p == param:
                return v

        return ""

    def GetAllParameters(self):
        return self.params

    def __repr__(self):
        return repr(self.params)

class ProjFile:

    def __init__(self, filename):
        self.projs = []

        self.SetFileName(filename)
    
    def Add(self, proj):
        self.projs.append(proj)

    def GetFileName(self):
        return self.filename

    def SetFileName(self, filename):
        self.filename = filename

    def GetProjections(self):
        return self.projs
1	# Copyright (c) 2001 by Intevation GmbH
2	# Authors:
3	# Bernhard Herzog <[email protected]>
4	#
5	# This program is free software under the GPL (>=v2)
6	# Read the file COPYING coming with Thuban for details.
7
8	__version__ = "$Revision$"
9
10	import Projection
11	BaseProjection = Projection.Projection
12	del Projection
13
14	class Projection(BaseProjection):
15
16	"""A proj4 projection object that remembers the parameters"""
17
18	def __init__(self, params, name = "Unknown"):
19	BaseProjection.__init__(self, params)
20	self.params = params
21	self.name = name
22
23	def ForwardBBox(self, bbox):
24	"""Return the bounding box of the corners of the bounding box bbox
25	"""
26	# This is not really the correct way to determine the bbox of a
27	# projected shape, but for now it works well enough
28	llx, lly, urx, ury = bbox
29	xs = []; ys = []
30	x, y = self.Forward(llx, lly)
31	xs.append(x); ys.append(y)
32	x, y = self.Forward(llx, ury)
33	xs.append(x); ys.append(y)
34	x, y = self.Forward(urx, ury)
35	xs.append(x); ys.append(y)
36	x, y = self.Forward(urx, lly)
37	xs.append(x); ys.append(y)
38	return min(xs), min(ys), max(xs), max(ys)
39
40	def GetName(self):
41	return self.name
42
43	def GetParameter(self, param):
44
45	for pair in self.params:
46	p, v = pair.split("=")
47	if p == param:
48	return v
49
50	return ""
51
52	def GetAllParameters(self):
53	return self.params
54
55	def __repr__(self):
56	return repr(self.params)
57
58	class ProjFile:
59
60	def __init__(self, filename):
61	self.projs = []
62
63	self.SetFileName(filename)
64
65	def Add(self, proj):
66	self.projs.append(proj)
67
68	def GetFileName(self):
69	return self.filename
70
71	def SetFileName(self, filename):
72	self.filename = filename
73
74	def GetProjections(self):
75	return self.projs
Name	Value
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svn:keywords	Author Date Id Revision