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test_dtm_process.py
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test_dtm_process.py
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# -*- coding: utf-8 -*-
"""
/***************************************************************************
Batch_Hillshader
A QGIS plugin to generate a three light
exposure hillshade (shaded relief by
combining three light exposures)
For more information, see the program documentation.
Plugin uses LASzip, see <https://laszip.org/>
-------------------
begin : 2016-07-13
git sha : $Format:%H$
copyright : (C) 2017 by PANOimagen S.L.
email : info@panoimagen.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 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <https://www.gnu.org/licenses/> *
***************************************************************************/
"""
import unittest
import tempfile
import os
from qgis.core import QgsApplication
import hillshader_process
import hillshade
import bandCalc
from plugin_utils import raster_funs
class DEMProcessTestCase(unittest.TestCase):
def setUp(self):
"""Initializing input data and dictionaries
"""
self.input_dem_file = '.\\test_data\\dem_input'
ext = '.tif'
# ext = '.asc'
self.input_dem = self.input_dem_file + ext
hillshade_params = {}
hillshade_params['azimuth1'] = 350
hillshade_params['azimuth2'] = 15
hillshade_params['azimuth3'] = 270
hillshade_params['angle_altitude1'] = 70
hillshade_params['angle_altitude2'] = 60
hillshade_params['angle_altitude3'] = 55
hillshade_params['transparency1'] = 50
hillshade_params['transparency2'] = 65
hillshade_params['transparency3'] = 70
self.hill_params = hillshade_params
def test_input(self):
"""Test for input data
"""
self.assertTrue(os.path.exists(self.input_dem))
def test_generating_hillshades_array(self):
"""test generating partial hillshades arrays from dem
"""
dem_array = raster_funs.raster_2_array(self.input_dem)
hillshade_1 = hillshade.hillshade(dem_array,
self.hill_params['azimuth1'],
self.hill_params['angle_altitude1'])
hillshade_2 = hillshade.hillshade(dem_array,
self.hill_params['azimuth2'],
self.hill_params['angle_altitude2'])
hillshade_3 = hillshade.hillshade(dem_array,
self.hill_params['azimuth3'],
self.hill_params['angle_altitude3'])
self.assertIsNotNone(hillshade_1)
self.assertIsNotNone(hillshade_2)
self.assertIsNotNone(hillshade_3)
def test_generating_hillshades_raster(self):
"""test generating partial hillshades rasters from dem
"""
temp_dir = tempfile.mkdtemp()
output_folder = os.path.join(temp_dir,'hillshader_results')
if not os.path.exists(output_folder):
os.makedirs(output_folder)
array = raster_funs.raster_2_array(self.input_dem)
raster_funs.array_2_raster(array,
self.input_dem,
os.path.join(output_folder, 'file.tif'))
self.assertTrue(os.path.exists(
os.path.join(output_folder, 'file.tif')))
def test_combinig_hillshades_arrays(self):
"""test combining arrays (band calculator)
"""
dem_array = raster_funs.raster_2_array(self.input_dem)
hillshade_1_array = hillshade.hillshade(dem_array,
self.hill_params['azimuth1'],
self.hill_params['angle_altitude1'])
hillshade_2_array = hillshade.hillshade(dem_array,
self.hill_params['azimuth2'],
self.hill_params['angle_altitude2'])
hillshade_3_array = hillshade.hillshade(dem_array,
self.hill_params['azimuth3'],
self.hill_params['angle_altitude3'])
combined_array = bandCalc.merge_arrays(
[hillshade_1_array, hillshade_2_array, hillshade_3_array],
[self.hill_params['transparency1'],
self.hill_params['transparency2'],
self.hill_params['transparency3']])
output_folder = os.path.join(tempfile.mkdtemp(),
'hillshader_results')
if not os.path.exists(output_folder):
os.mkdir(output_folder)
out_put = os.path.join(output_folder, 'combined_hillshade.tif')
raster_funs.array_2_raster(combined_array, self.input_dem, out_put)
self.assertTrue(os.path.exists(out_put))
self.assertNotAlmostEquals(0, combined_array.any())
self.assertEqual(combined_array.shape, (100, 100))
self.assertAlmostEqual(int(combined_array.max()), 255)
self.assertAlmostEqual(int(combined_array.min()), 0)
self.assertAlmostEqual(int(combined_array.mean()), 255/2)
def tearDown(self):
pass
def qgis_app_init():
from qgis.PyQt import QtWidgets
import os
import atexit
atexit.register(QgsApplication.exitQgis)
app = QtWidgets.QApplication([])
qgis_prefix = os.getenv("QGIS_PREFIX_PATH")
# Initialize qgis libraries
QgsApplication.setPrefixPath(qgis_prefix, True)
QgsApplication.initQgis()
return app
app = qgis_app_init()
if __name__ == "__main__":
unittest.main()