Fellow users,
Thanks for your previous help regarding filtering for features, as I
didn't know quite how to approach that problem. Now I have an
extension of the problem which I think I can answer but I want to
understand some of the elements first:
Description of the problem:
I have 18 shapefiles. All are georeferenced to the same area. 1
contains the bounding polygons for the areas of interest (study file),
the remaining 17 do not (data files). I need to overlay the polygon
from the study file onto the other data files to get their data for
the time when the data was created. I need to be able to list the
study areas and then quickly pull up their historical data.
Possible solution (with questions):
1) I filter my area of interest file for the Features which I need
right now.
2) from the resulting FeatureCollection I grab THE_GEOM which holds
the jts polygon of the feature itself.
3) to make these available for faster reference later, I need to save
the polygon into PostGIS in some fashion
*) if all of the files I'm using are georeferenced, do I need to save
any external information other than the polygon to locate the same
area on a different shapefile?
*) is there a way to load everything from the study file into
PostGIS, extract the polygon when I need it and apply it against the
other shape files?
4) when I need to call up the other data, load the polygon from the
study file or data base
5) create a filter with this polygon
6) filter datafiles.
7) display results in whatever format I need.
Does this seem correct to you?
TIA,
Steve Fines
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