Hey Frank,
Thanks for your reply. Your understanding of my requirement is correct.
Can you please give me the fully qualified names of the classes that you
have used in your code?
Is this code for .shp file or dbf?
From: Frank van der Hulst <[email protected]>
Date: Tue, 11 Feb 2014 12:49:06 +1300
To: Manisha Raisinghani <[email protected]>
Cc: geotools users <[email protected]>
Subject: Re: [Geotools-gt2-users] Find if a point lies in a Shapefile
polygon
When you say "lies in a particular shp file", I assume you actually mean
"lies inside one of the polygons contained in a shp file"?
There may be a mode direct way (look up Filters and see if the support some
kind of "contains" feature), but what would work is to only get polygons
from the file which have a bounding box containing the point you want, and
then iterate through those to find which one(s) contain the point.
Here's some code of mine thate gets features from a Shapefile which overlap
a specified bounding box... I guess if you replaced Envelope limits with a
Point, that would work for the first part. NB... you can't access a
Shapefile's features after the Shapefile is closed, hence the forced
instantiation in the load(). If you add something like
if(!geometry.contains(specifiedPoint)) continue; the results should only
contain polygons which do contain your specified point.
Frank
/**
* Open a Shapefile
*
* @param filepath
* @param limits
*/
public Shapefile(String filepath, Envelope limits) {
Log.d("Opening shapefile " + filepath);
file = new File(filepath);
try {
store = FileDataStoreFinder.getDataStore(file);
featureSource = store.getFeatureSource();
Filter filter = CQL.toFilter("BBOX(the_geom, " + limits.getMinX() + ",
" + limits.getMinY() + ", " + limits.getMaxX() + ", " + limits.getMaxY() +
")");
Query query = new Query();
query.setFilter(filter);
query.setHints(new Hints(Hints.FEATURE_2D, Boolean.TRUE)); // force 2D
data
srcCollection = featureSource.getFeatures(filter);
} catch (CQLException | IOException ex) {
Util.crash(ex);
}
}
/**
* Load a Shapefile
*
* @param filepath
* @param limits
* @return
*/
public static DefaultFeatureCollection load(String filepath, Envelope
limits) {
Shapefile src = new Shapefile(filepath, limits);
Log.d("Loading shapefile " + filepath);
SimpleFeatureType schema = src.srcCollection.getSchema();
DefaultFeatureCollection result = new DefaultFeatureCollection();
try (SimpleFeatureIterator inputIt = src.srcCollection.features()) {
while (inputIt.hasNext()) {
SimpleFeature f = inputIt.next();
// This forces instantiation of each feature
Geometry geometry = ((Geometry) f.getDefaultGeometry()).union();
Feature f2 = new Feature(f.getID());
f2.setDefaultGeometry(geometry);
Log.v(f2.getID());
result.add(f2);
}
inputIt.close();
src.close();
}
return result;
}
On Tue, Feb 11, 2014 at 8:19 AM, manisharai <[email protected]> wrote:
> Hi
>
> I am new to GeoTools. I have a question regarding shp files.
>
> I am trying to find out if a point (lat,lon) lies in a particular shp file.
> Is there a method for the same?
>
> Can someone please provide the code if its already there?
>
>
>
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/Find-if-a-point-lies-in-a-Shapefile-polygo
> n-tp5103029.html
> Sent from the geotools-gt2-users mailing list archive at Nabble.com.
>
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