def initTerrain(self, op, context, basePath, addonName):
self.setDataDir(context, basePath, addonName)
# create a sub-directory under <self.dataDir> for OSM files
terrainDir = os.path.join(self.dataDir, self.terrainSubDir)
self.terrainDir = terrainDir
if not os.path.exists(terrainDir):
os.makedirs(terrainDir)
self.setAttributes(context)
self.terrainSize = 3600//int(self.terrainResolution)
# we are going from top to down, that's why we call reversed()
self.latIntervals = tuple(reversed(Terrain.getHgtIntervals(self.minLat, self.maxLat)))
self.lonIntervals = Terrain.getHgtIntervals(self.minLon, self.maxLon)
missingHgtFiles = self.getMissingHgtFiles()
# download missing .hgt files
for missingPath in missingHgtFiles:
missingFile = os.path.basename(missingPath)
self.download(
self.terrainUrl % (missingFile[:3], missingFile),
missingPath
)
