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Update OT API key handling #9

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Update OT API key handling #9

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7 changes: 6 additions & 1 deletion download_global_DEM.py
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,7 @@ def get_parser():
group.add_argument('-raster_fn',help='Raster dataset filename specifying desired extent.',
type=str,required=False,default=None)
parser.add_argument('-pad',help='Pad bounds (deg)',type=float,default=0,required=False)
parser.add_argument('-apikey',help='Opentopgraphy API key',type=str,default='demoapikeyot2022',required=False)
parser.add_argument('-apikey',help='Opentopgraphy API key',default=None,type=str,required=False)
parser.add_argument('-out_fn',help='Desired output filename, the program appends output horizontal crs EPSG code at the end',type=str,default=None)
parser.add_argument('-local_utm',help='Use local UTM projection for the output DEM (default: %(default)s)',action='store_true')
parser.add_argument('-out_proj',type=str,default=None,help='Output EPSG code for horizontal CRS (e.g., EPSG:4326, EPSG:32610); if non-local UTM CRS is desired. In case "-local_utm" or this option is not selected, will default to opentopography provided horizontal CRS')
Expand Down Expand Up @@ -53,6 +53,11 @@ def main():
bounds = [float(minx),float(miny),float(maxx),float(maxy)]
bounds = [bounds[0] - args.pad, bounds[1] - args.pad, bounds[2] + args.pad, bounds[3] + args.pad]
print(bounds)
if args.apikey is None:
#Attempt to read from OT_API_KEY environmental variable
args.apikey = opentopo_utils.get_ot_apikey()
if args.apikey is None:
sys.exit("\nMissing OpenTopography API key.\nFor convenience, can set OT_API_KEY environmental variable, which will be read automatically.\nSee https://opentopography.org/blog/introducing-api-keys-access-opentopography-global-datasets for details.")
opentopo_utils.get_dem(demtype=args.demtype, bounds=bounds, apikey=args.apikey, out_fn=args.out_fn, local_utm = args.local_utm, proj=args.out_proj)

if __name__=="__main__":
Expand Down
7 changes: 6 additions & 1 deletion fetch_dem/opentopo_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,12 @@
import shapely
import subprocess

def get_ot_apikey(variable_name='OT_API_KEY'):
apikey = None
if variable_name in os.environ:
apikey=os.environ[variable_name]
return apikey

def get_dem(demtype, bounds, apikey, out_fn=None, proj='EPSG:4326',local_utm=False,output_res=30):
"""
download a DEM of choice from OpenTopography World DEM
Expand Down Expand Up @@ -32,7 +38,6 @@ def get_dem(demtype, bounds, apikey, out_fn=None, proj='EPSG:4326',local_utm=Fal
"""
import requests
from distutils.spawn import find_executable
### first written by David Shean (dshean@uw.edu)
base_url="https://portal.opentopography.org/API/globaldem?demtype={}&west={}&south={}&east={}&north={}&outputFormat=GTiff&API_Key={}"
if out_fn is None:
out_fn = '{}.tif'.format(demtype)
Expand Down