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from Common.geotools import get_query_bbox
import planetary_computer as PC
from pystac_client import Client
import tqdm
import rasterio
import rasterio.mask
from pyproj import Transformer as T
import os
from shapely.geometry import Polygon
import urllib.request
def fetch(shp, output_fld, product='cop-dem-glo-30', auth=None):
if auth is not None:
os.environ['PC_SDK_SUBSCRIPTION_KEY'] = auth
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bbox, i_bbox, shp_srs = get_query_bbox(shp, return_all=True)
api = Client.open('https://planetarycomputer.microsoft.com/api/stac/v1', modifier=PC.sign_inplace)
res = api.search(collections=product, bbox=bbox)
prg = tqdm.tqdm(total=len(res.item_collection()), desc="Fetching from Planetary")
key = 'data'
if product == 'nasadem':
key = 'elevation'
for item in res.items():
with rasterio.open(item.assets[key].href) as ds:
img_srs = ds.crs.to_epsg()
aff = ds.profile['transform']
if shp_srs == img_srs:
o_bbox = [aff[0] * round((x + aff[0]*o) / aff[0]) for x,o in zip(i_bbox, [-2,-2,1,1])]
else:
tr = T.from_crs(shp_srs, img_srs, always_xy=True)
x_min, y_min = tr.transform(i_bbox[0], i_bbox[1])
x_max, y_max = tr.transform(i_bbox[2], i_bbox[3])
o_bbox = [aff[0] * round((x + aff[0]*o) / aff[0]) for x,o in zip([x_min, y_min, x_max, y_max], [-2,-2,1,1])]
ofn = os.path.join(output_fld, item.assets[key].get_absolute_href().split('?')[0].split('/')[-1])
os.makedirs(os.path.dirname(ofn),exist_ok=True)
with rasterio.open(item.assets[key].href) as img:
out_img, out_geot = rasterio.mask.mask(img,
[Polygon.from_bounds(o_bbox[0], o_bbox[1],
o_bbox[2], o_bbox[3])],
crop=True,
all_touched=True)
out_meta = img.meta
out_meta.update({"driver": "GTiff",
"height": out_img.shape[1],
"width": out_img.shape[2],
"transform": out_geot})
with rasterio.open(ofn, "w", **out_meta) as dest:
dest.write(out_img)
prg.update()
prg.close()
return
def retrieve_geoid(out_fld):
os.makedirs(out_fld, exist_ok=True)
urllib.request.urlretrieve(
'https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/raw/develop/Data/Input/DEM/egm96.grd?inline=false',
os.path.join(out_fld, 'egm96.grd'))
urllib.request.urlretrieve(
'https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/-/raw/develop/Data/Input/DEM/egm96.grd.hdr?inline=false',
os.path.join(out_fld, 'egm96.grd.hdr'))
return