def test_get_wradlib_data_path(self): wrl_data_path = os.environ.get("WRADLIB_DATA", None) del os.environ["WRADLIB_DATA"] with pytest.raises(EnvironmentError): util.get_wradlib_data_path() if wrl_data_path is not None: os.environ["WRADLIB_DATA"] = wrl_data_path
def test_get_wradlib_data_path(self): wrl_data_path = os.environ.get('WRADLIB_DATA', None) del os.environ['WRADLIB_DATA'] self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_path()) filename = 'rainbow/2013070308340000dBuZ.azi' os.environ['WRADLIB_DATA'] = os.path.join(wrl_data_path, filename) self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_path()) os.environ['WRADLIB_DATA'] = wrl_data_path filename = os.path.join(wrl_data_path, "test.dat") self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_file(filename))
def test_get_wradlib_data_path(self): wrl_data_path = os.environ.get('WRADLIB_DATA', None) del os.environ['WRADLIB_DATA'] self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_path()) filename = 'rainbow/2013070308340000dBuZ.azi' os.environ['WRADLIB_DATA'] = os.path.join(wrl_data_path, filename) self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_path()) os.environ['WRADLIB_DATA'] = wrl_data_path filename = os.path.join(wrl_data_path, "test.dat") self.assertRaises(EnvironmentError, lambda: util.get_wradlib_data_file(filename))
def get_srtm(extent, version=2, resolution=3, merge=True, download=None): """ Get NASA SRTM elevation data Parameters ---------- extent : str lonmin, lonmax, latmin, latmax version : int srtm version (2 or 3) resolution : int resolution of SRTM data (1, 3 or 30) merge : bool True to merge the tiles in one dataset download : dict download options (see download_srtm) Returns ------- dataset : gdal.Dataset Raster dataset containing elevation information """ extent = [int(np.floor(x)) for x in extent] lonmin, lonmax, latmin, latmax = extent filelist = [] for latitude in range(latmin, min(latmax, 0)): for longitude in range(lonmin, min(lonmax, 0)): georef = "S%02gW%03g" % (-latitude, -longitude) filelist.append(georef) for longitude in range(max(lonmin, 0), lonmax + 1): georef = "S%02gE%03g" % (-latitude, longitude) filelist.append(georef) for latitude in range(max(0, latmin), latmax + 1): for longitude in range(lonmin, min(lonmax, 0)): georef = "N%02gW%03g" % (latitude, -longitude) filelist.append(georef) for longitude in range(max(lonmin, 0), lonmax + 1): georef = "N%02gE%03g" % (latitude, longitude) filelist.append(georef) if version == 3: filelist = ["%s.SRTMGL%s" % (f, resolution) for f in filelist] filelist = ["%s.hgt.zip" % (f) for f in filelist] wrl_data_path = util.get_wradlib_data_path() srtm_path = os.path.join(wrl_data_path, "geo") if not os.path.exists(srtm_path) and download is not None: os.makedirs(srtm_path) demlist = [] for filename in filelist: path = os.path.join(srtm_path, filename) if os.path.exists(path): demlist.append(path) continue if download is not None: download_srtm(filename, path, version, resolution, **download) if os.path.exists(path): demlist.append(path) demlist = [gdal.Open(d) for d in demlist] if not merge: return demlist dem = gdal.Warp("", demlist, format="MEM") return dem
def test_get_wradlib_data_path_requires(self): filename = os.path.join(util.get_wradlib_data_path(), "test.dat") with pytest.raises(EnvironmentError): util.get_wradlib_data_file(filename)