On 10/14/22 10:48, Stefan Gofferje wrote:
I have a little hobby project where I pull Sentinel imagery of my town's
area and create various composites. I run that every morning, so I have
a bunch of raster images which represent the same geographic area at
different times. I recently also started playing with mapserver and I
would like to set up a mapserver to serve those images. I know mapserver
basics, have my first mapserver up and running.
What I'm looking for now is how to create a tile index for a bunch of
images which includes the times of those images, so I can server them
from mapserver as a layer with a time dimension.
In case it is of use for anybody, here is the solution I came up with
last night:
1.) Add a time index metadatum to the output file
(gdaltranslate/gdal_edit -mo TIMEINDEX="yyyy-mm-ddThhmmZ"
2.) Hack together a Python script:
#!/usr/bin/python3
import os, sys
from osgeo import gdal
import geopandas as gpd
from shapely.geometry import box
import warnings
warnings.filterwarnings("ignore")
StartDir = str(sys.argv[1])
def getBounds(path):
raster = gdal.Open(path)
ulx, xres, xskew, uly, yskew, yres = raster.GetGeoTransform()
lrx = ulx + (raster.RasterXSize * xres)
lry = uly + (raster.RasterYSize * yres)
return box(lrx, lry, ulx, uly)
df = gpd.GeoDataFrame(columns=['location', 'geometry','timestamp'])
for dir, subdir, files in os.walk(StartDir):
for fname in files:
if fname.endswith(".tif"):
fullname = os.path.join(dir+"/", fname)
print (fullname)
ds=gdal.Open(fullname)
metadata=ds.GetMetadata()
ds=None
print(metadata)
df = df.append({'location': fname, 'geometry':
getBounds(fullname),'timestamp': metadata['TIMESTAMP']}, ignore_index=True)
# df = gpd.pd.concat(df,{'location': fname, 'geometry':
getBounds(os.path.join(dir+"/", fname))}, ignore_index=True)
df.to_file("tile-index.shp")
NOTE: suppressing all warnings is temporary until I figured out how to
move from df.append to pd.concat.
-Stefan
--
(o_ Stefan Gofferje | SCLT, MCP, CCSA
//\ Reg'd Linux User #247167 | VCP #2263
V_/_ https://www.gofferje.net | https://www.saakeskus.fi
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