Tagged Questions
1
vote
1answer
647 views
Convert latitude longitude coordinate to x y coordinate?
I'm using a postgis database and java to develop my application.
I need to transform my geographic data currently in latitude/longitude format into a x/y format.
I found solutions based on UTM ...
2
votes
0answers
266 views
Hibernate Spatial 4 and Postgis 2.0
I'm having some issues integratings this technologies:
Hibernate Spatial 4.0-M1
Postgis 2.0.2 (with compiled jdbc 2.0.2)
Hibernate 4.1.1
The specific error is:
Caused by: ...
1
vote
0answers
68 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 ...
0
votes
1answer
72 views
Column exists in DatabaseMetaData, but does not exist in relation?
I am using JDBC to query a PostgreSQL database. And I want to populate a column called wiki_url based on the value of another column, level which will determine which value of 5 columns to concatenate ...
2
votes
0answers
67 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"
...
0
votes
2answers
107 views
dijkstra_sp runs without error in postgres query terminal, but triggers an error in Java
I am running this simple query
select id,gid from dijkstra_sp('roads',22,33)
This works perfectly fine and returns results in postgres query terminal. However running exactly the same query in java ...
4
votes
1answer
748 views
How to setup PostGIS JDBC with Hibernate?
I try to setup an Java Application with Hibernate and PostGIS but I always get nasty exceptions like :
java.lang.NoSuchMethodError: org.hibernate.type.CustomType.<init>
...
5
votes
1answer
232 views
GIS-based reporting and maintenance tool
Background
Conceptually, I am looking for a tool, or suite of software tools that can be readily integrated to help browse data using a GIS-based map (such as Google Maps). The proposed architecture ...
2
votes
2answers
369 views
How to create hibernate layers at runtime?
We need to dynamically create hibernate layers from shapefiles. As far as we understand, the workflow is following:
Import shapefile to database(creating new table for each shapefile?)
Is it good ...
6
votes
1answer
345 views
Data visualization and maintenance tool
Background
Looking to leverage an existing GIS system for exploring organizational data.
Architecture
The following figure represents a high-level overview of the system's desired features:
The ...
4
votes
1answer
376 views
Can PostGIS functions be written in Java?
I am wondering if there is a possibility of programming new functions for PostGIS using Java, so that you can refer them same way as classic PostGIS functions are. Something like this:
CREATE OR ...
2
votes
2answers
471 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 ...
1
vote
1answer
790 views
How to connect GeoServer with Java to a PostGIS/PostGres database?
I am having trouble using GeoServer to perform a shortest path analysis between two network points. My question is about connecting GeoServer with Java to a PostGIS/PostGres database.
I know that in ...
1
vote
1answer
248 views
Building orientation and simplification using Opencarto Java library
I need to find out orientation of buildings and perform simplification of sides of buildings with a tolerance. I came to know from StackExchange that OpenCarto has useful libraries for geometrical ...
1
vote
1answer
417 views
How to extract data from a POINT column in PostGIS using JAVA (jdbc)
How do you get a value from a column which has a point data type.
I've just switched over from MySQL to PostGIS. I have a column which is called point and is of type Point.
I want to get that value ...
