def geojson_tile_burn(tile, features, srid, ts, burn_value=1):
"""Burn tile with GeoJSON features."""
crs = (CRS.from_epsg(srid), CRS.from_epsg(3857))
shapes = ((transform_geom(*crs, feature["geometry"]), burn_value)
for feature in features)
try:
return rasterize(shapes,
out_shape=ts,
transform=from_bounds(*tile_bbox(tile, mercator=True),
*ts))
except:
return None
def main(args):
assert not (args.geojson is not None and args.pg is not None), "You have to choose between --pg or --geojson"
assert len(args.ts.split(",")) == 2, "--ts expect width,height value (e.g 512,512)"
config = load_config(args.config)
check_classes(config)
args.pg = config["auth"]["pg"] if not args.pg and "pg" in config["auth"].keys() else args.pg
assert not (args.sql and not args.pg), "With --sql option, --pg dsn setting must also be provided"
palette, transparency = make_palette([classe["color"] for classe in config["classes"]], complementary=True)
index = [config["classes"].index(classe) for classe in config["classes"] if classe["title"] == args.type]
assert index, "Requested type is not contains in your config file classes."
burn_value = index[0]
assert 0 < burn_value <= 255
if args.sql:
assert "limit" not in args.sql.lower(), "LIMIT is not supported"
assert "TILE_GEOM" in args.sql, "TILE_GEOM filter not found in your SQL"
sql = re.sub(r"ST_Intersects( )*\((.*)?TILE_GEOM(.*)?\)", "1=1", args.sql, re.I)
assert sql and sql != args.sql, "Incorrect TILE_GEOM filter in your SQL"
if os.path.dirname(os.path.expanduser(args.out)):
os.makedirs(os.path.expanduser(args.out), exist_ok=True)
args.out = os.path.expanduser(args.out)
log = Logs(os.path.join(args.out, "log"), out=sys.stderr)
tiles = [tile for tile in tiles_from_csv(os.path.expanduser(args.cover))]
assert len(tiles), "Empty Cover: {}".format(args.cover)
if args.geojson:
zoom = tiles[0].z
assert not [tile for tile in tiles if tile.z != zoom], "Unsupported zoom mixed cover. Use PostGIS instead"
feature_map = collections.defaultdict(list)
log.log("neo rasterize - Compute spatial index")
for geojson_file in args.geojson:
with open(os.path.expanduser(geojson_file)) as geojson:
feature_collection = json.load(geojson)
srid = geojson_srid(feature_collection)
for i, feature in enumerate(tqdm(feature_collection["features"], ascii=True, unit="feature")):
feature_map = geojson_parse_feature(zoom, srid, feature_map, feature, args.buffer)
features = args.geojson
if args.sql:
conn = psycopg2.connect(args.pg)
db = conn.cursor()
db.execute("""SELECT ST_Srid("1") AS srid FROM ({} LIMIT 1) AS t("1")""".format(sql))
srid = db.fetchone()[0]
assert srid and int(srid) > 0, "Unable to retrieve geometry SRID."
features = args.sql
if not len(feature_map):
log.log("-----------------------------------------------")
log.log("NOTICE: no feature to rasterize, seems peculiar")
log.log("-----------------------------------------------")
log.log("neo rasterize - rasterizing {} from {} on cover {}".format(args.type, features, args.cover))
with open(os.path.join(os.path.expanduser(args.out), args.type.lower() + "_cover.csv"), mode="w") as cover:
for tile in tqdm(tiles, ascii=True, unit="tile"):
geojson = None
if args.sql:
w, s, e, n = tile_bbox(tile)
tile_geom = "ST_Transform(ST_MakeEnvelope({},{},{},{}, 4326), {})".format(w, s, e, n, srid)
query = """
WITH
sql AS ({}),
geom AS (SELECT "1" AS geom FROM sql AS t("1")),
json AS (SELECT '{{"type": "Feature", "geometry": '
|| ST_AsGeoJSON((ST_Dump(ST_Transform(ST_Force2D(geom.geom), 4326))).geom, 6)
|| '}}' AS features
FROM geom)
SELECT '{{"type": "FeatureCollection", "features": [' || Array_To_String(array_agg(features), ',') || ']}}'
FROM json
""".format(
args.sql.replace("TILE_GEOM", tile_geom)
)
db.execute(query)
row = db.fetchone()
try:
geojson = json.loads(row[0])["features"] if row and row[0] else None
except Exception:
log.log("Warning: Invalid geometries, skipping {}".format(tile))
conn = psycopg2.connect(args.pg)
db = conn.cursor()
if args.geojson:
geojson = feature_map[tile] if tile in feature_map else None
if geojson:
num = len(geojson)
out = geojson_tile_burn(tile, geojson, 4326, list(map(int, args.ts.split(","))), burn_value)
if not geojson or out is None:
num = 0
out = np.zeros(shape=list(map(int, args.ts.split(","))), dtype=np.uint8)
tile_label_to_file(args.out, tile, palette, transparency, out, append=args.append)
cover.write("{},{},{} {}{}".format(tile.x, tile.y, tile.z, num, os.linesep))
if not args.no_web_ui:
template = "leaflet.html" if not args.web_ui_template else args.web_ui_template
base_url = args.web_ui_base_url if args.web_ui_base_url else "."
tiles = [tile for tile in tiles_from_csv(args.cover)]
web_ui(args.out, base_url, tiles, tiles, "png", template)