2
votes
2answers
292 views

Conversion of point grid to a raster with open source tools (Gdal, QGIS …)

I'm looking to do something which seem simple to me, but I haven't found a solution since 2 days I looked for. I've got a Postgis DB with lot of points (WGS84) spaced of 100 meters which cover a ...
5
votes
1answer
146 views

Good projection for covering most of the world

I'm writing an application for building navigation routes thru the city streets, and not quite sure what projection would be best. I tried EPSG:3587, however, the tools I'm using - GeoTools and ...
2
votes
1answer
695 views

GeoTools and PostGIS with ESPG:3857

I'm trying to use both PostGIS and GeoTools with the same ESPG:3857 projection, however, it looks like the projections in PostGIS and GeoTools differ. This is what I have in PostGIS: PROJCS["WGS 84 ...
3
votes
0answers
70 views

Why are date vaules displaying a trailing 'Z' when layers are published with Geoserver and a PostGIS data store?

I have published various layers using Geoserver 2.2.x with a PostGIS 2.0.1 (PostgreSQL 9.1.x) data store. Fields that only have date values and not time/timestamp related values are stored as date. ...
0
votes
1answer
160 views

Can I use GeoTools with Gradle?

I am going to implement shapefile uploading from a webform, and ingestion into PostGIS. One problem I am having is that my project is using Gradle for dependency management. I am unfamiliar with ...
1
vote
1answer
55 views

GeoTools Omitting Quotes in its Queries?

I have a table in my PostgreSQL 8.4 with a column 'Shape' of type 'geometry'. When I start up Tomcat my GeoServer throws an exception: 24 Sep 16:20:25 WARN [geotools.jdbc] - Error occured determing ...
1
vote
0answers
179 views

GeoTools example for Shapefile export to already existing PostGIS table

I'm a newbie to GeoTool API, and I'm looking for a way to export the specific shapefile to the specific already existing PostGIS table with GeoTools (the underlying problem I face is that PostGIS ...
1
vote
1answer
107 views

Diff operation in PostGIS/Geotools

What is the best way to perform a diff operation on Postgis features/tables or Geotools objects? Are there any automatic methods I can use? If not, what would be the optimal way to implement your own ...
5
votes
2answers
1k views

Fastest way to convert shapefile to postgis in java

I have been using geotools to read shapefiles and import them into postgis. Unfortunately, when large files are being imported, this leads to a massive lag time --8000% of shp2pgsql piped into pgsql-- ...
1
vote
0answers
177 views

Renaming Columns in Geotools FeatureType

I am attempting to build a simple java program that loads shapefiles into a Postgis 2.0 database. Everything is working out great except that I would like to be able to modify the FeatureType in the ...
2
votes
0answers
84 views

MultiPolygon from database

I would like to know how to create an instance of a Multipoint from a PostGIS database.. I do the query , then got the ResultSet named "area" , the column with MultiPolygon attributes is named "geom" ...
2
votes
1answer
843 views

How can I deploy a custom GeoTools datastore to GeoServer?

I'm using GeoTools v8.0 and GeoServer v2.1.3. I've currently built a working datastore connecting to a PostGIS database based off of the GeotTools' abstract datastore tutorial. After days of on and ...
2
votes
2answers
772 views

How to add a background map to a java project?

I'm new at GIS. I am trying to make a java application that can display a map with certain points. I have achieved this using the geotools library. However, I want to put the map from OpenStreetMap or ...