/
nviz7.py
183 lines (160 loc) · 7.14 KB
/
nviz7.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
# -*- coding: utf-8 -*-
"""
***************************************************************************
nviz7.py
---------------------
Date : August 2012
Copyright : (C) 2012 by Victor Olaya
Email : volayaf at gmail dot com
***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************
"""
__author__ = 'Victor Olaya'
__date__ = 'August 2012'
__copyright__ = '(C) 2012, Victor Olaya'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
import time
from qgis.PyQt.QtGui import QIcon
from qgis.core import QgsRasterLayer
from processing.core.GeoAlgorithm import GeoAlgorithm
from processing.core.parameters import ParameterMultipleInput
from processing.core.parameters import ParameterExtent
from processing.core.parameters import ParameterNumber
from processing.core.parameters import ParameterRaster
from .Grass7Utils import Grass7Utils
from processing.tools.system import getNumExportedLayers
from processing.tools import dataobjects
pluginPath = os.path.normpath(os.path.join(
os.path.split(os.path.dirname(__file__))[0], os.pardir))
class nviz7(GeoAlgorithm):
ELEVATION = 'ELEVATION'
VECTOR = 'VECTOR'
COLOR = 'COLOR'
GRASS_REGION_EXTENT_PARAMETER = 'GRASS_REGION_PARAMETER'
GRASS_REGION_CELLSIZE_PARAMETER = 'GRASS_REGION_CELLSIZE_PARAMETER'
def __init__(self):
GeoAlgorithm.__init__(self)
self.showInModeler = False
def getIcon(self):
return QIcon(os.path.join(pluginPath, 'images', 'grass.png'))
def defineCharacteristics(self):
self.name, self.i18n_name = self.trAlgorithm('nviz7')
self.group, self.i18n_group = self.trAlgorithm('Visualization(NVIZ)')
self.addParameter(ParameterMultipleInput(
nviz7.ELEVATION,
self.tr('Raster file(s) for elevation'),
ParameterMultipleInput.TYPE_RASTER, True))
self.addParameter(ParameterMultipleInput(
nviz7.VECTOR,
self.tr('Vector lines/areas overlay file(s)'),
ParameterMultipleInput.TYPE_VECTOR_ANY, True))
self.addParameter(ParameterMultipleInput(
nviz7.COLOR,
self.tr('Raster file(s) for color'),
ParameterMultipleInput.TYPE_RASTER, True))
self.addParameter(ParameterExtent(
nviz7.GRASS_REGION_EXTENT_PARAMETER,
self.tr('GRASS region extent')))
self.addParameter(ParameterNumber(
self.GRASS_REGION_CELLSIZE_PARAMETER,
self.tr('GRASS region cellsize (leave 0 for default)'),
0, None, 0.0))
def processAlgorithm(self, progress):
commands = []
vector = self.getParameterValue(self.VECTOR)
elevation = self.getParameterValue(self.ELEVATION)
color = self.getParameterValue(self.COLOR)
region = \
unicode(self.getParameterValue(self.GRASS_REGION_EXTENT_PARAMETER))
regionCoords = region.split(',')
command = 'g.region '
command += 'n=' + unicode(regionCoords[3])
command += ' s=' + unicode(regionCoords[2])
command += ' e=' + unicode(regionCoords[1])
command += ' w=' + unicode(regionCoords[0])
cellsize = self.getParameterValue(self.GRASS_REGION_CELLSIZE_PARAMETER)
if cellsize:
command += ' res=' + unicode(cellsize)
else:
command += ' res=' + unicode(self.getDefaultCellsize())
commands.append(command)
command = 'nviz7'
if vector:
layers = vector.split(';')
for layer in layers:
(cmd, newfilename) = self.exportVectorLayer(layer)
commands.append(cmd)
vector = vector.replace(layer, newfilename)
command += ' vector=' + vector.replace(';', ',')
if color:
layers = color.split(';')
for layer in layers:
(cmd, newfilename) = self.exportRasterLayer(layer)
commands.append(cmd)
color = color.replace(layer, newfilename)
command += ' color=' + color.replace(';', ',')
if elevation:
layers = elevation.split(';')
for layer in layers:
(cmd, newfilename) = self.exportRasterLayer(layer)
commands.append(cmd)
elevation = elevation.replace(layer, newfilename)
command += ' elevation=' + elevation.replace(';', ',')
if elevation is None and vector is None:
command += ' -q'
commands.append(command)
Grass7Utils.createTempMapset()
Grass7Utils.executeGrass7(commands, progress)
def getTempFilename(self):
filename = 'tmp' + unicode(time.time()).replace('.', '') \
+ unicode(getNumExportedLayers())
return filename
def exportVectorLayer(self, layer):
destFilename = self.getTempFilename()
command = 'v.in.ogr'
command += ' min_area=-1'
command += ' input="' + os.path.dirname(layer) + '"'
command += ' layer=' + os.path.basename(layer)[:-4]
command += ' output=' + destFilename
command += ' --overwrite -o'
return (command, destFilename)
def exportRasterLayer(self, layer):
destFilename = self.getTempFilename()
command = 'r.in.gdal'
command += ' input="' + layer + '"'
command += ' band=1'
command += ' out=' + destFilename
command += ' --overwrite -o'
return (command, destFilename)
def getDefaultCellsize(self):
cellsize = 0
for param in self.parameters:
if param.value:
if isinstance(param, ParameterRaster):
if isinstance(param.value, QgsRasterLayer):
layer = param.value
else:
layer = dataobjects.getObjectFromUri(param.value)
cellsize = max(cellsize, (layer.extent().xMaximum()
- layer.extent().xMinimum())
/ layer.width())
elif isinstance(param, ParameterMultipleInput):
layers = param.value.split(';')
for layername in layers:
layer = dataobjects.getObjectFromUri(layername)
if isinstance(layer, QgsRasterLayer):
cellsize = max(cellsize, (
layer.extent().xMaximum()
- layer.extent().xMinimum())
/ layer.width())
if cellsize == 0:
cellsize = 1
return cellsize