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Questions tagged [geotools]

GeoTools is an open source Java library that provides tools for geospatial data (http://geotools.org). Questions about programming using GeoTools are on topic here, while questions on geographic issues (while using GeoTools) should be asked on https://gis.stackexchange.com.

For questions about how to complete geographic tasks using the GeoTools library you may want to ask on https://gis.stackexchange.com/ to get answers, if your question focuses on programming issues with GeoTools then ask on this site.

565 questions
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NoSuchMethodException while calling GeometryJSON().read()

I am using JTS (from VividSolutions) and GeoTools. I have the following code: public Geometry jsonToGeom(String json) throws IOException { Geometry obj = new GeometryJSON().read(json); return obj; } However, this returns the following…
Abhishek Dey Das
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Java way to quickly find if a point falls in a country (polygon)

I'm hoping someone can point me in the right direction. We have millions of records flowing/streaming through where we need to do a quick lookup to determine which country polygon they fall into. Could someone recommend a complete JAVA based…
user2092856
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Geotools GeometryJSON rounding coordinates when transforming Geometry to GeoJSON

Any Geotools developers here? We discovered the following strange behaviour of GeometryJSON: Geometry geom = getGeometry(); System.out.println(geom); GeometryJSON g = new GeometryJSON(); StringWriter sw = new StringWriter(); try…
chris
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Maven Missing artifact org.geotools:gt-shapefile:jar:11-SNAPSHOT

Hello I am trying to write a simple geotools project with maven. Actually I am very new to maven. I opened new maven project I set the setting and write some code. As I know maven should download and install the needed jar files of geotools. But A…
ali insan
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Hadoop and Geoserver

I'am intending to develop a new datastore based on Hadoop/HBase for Geotools to use it in Geoserver just to visualise Raster data (tiled satellite image). Has anyone done something similar or even know if this is possible ? I already know how to…
thiagogcm
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JTS/Geotools Correct union/difference of multiple geometry

Problem : I have a shape file that contains the targeted area (yellow). I have a shape file that contains the buildings (green). I need the white space in the yellow area. picture : ://db.tt/kjjXZlQF My solutions : Get all buildings in that area…
HappyProgrammerUser
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Incorrect coordinate transformation Gauss-Kruger - WGS84 using GeoTools

I´m having a problem concerning the beloved coordinate transformation with the aid of GeoTools: I would like to convert a set of coordinates from Gauss-Kruger (zone 5, EPSG 31469) into ordinary WGS84 coordinates (EPSG 4326). I´ve built a code with a…
sebjun87
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Determining whether geographic point is within X meters of a state border (using shapefile for border data)

So I'm writing a Java app, and I've got an ESRI Shapefile which contains the borders of all the U.S. states. What I need is to be able to determine whether any given lat/lon point is within a specified distance from ANY state border line - i.e., I…
DanM
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How to filter data from an hstore column with GeoTools?

I'm trying to filter features from a feature table in a PostGIS enabled database with GeoTools. My configuration: PostgreSQL 8.4 PostGIS 1.5 Osmosis 0.40.1 OSMembrane build 845 GeoTools 2.7.4 Setup I set up my postgis enabled database by executing…
pmoule
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How to create regular hexagons on java to put on a map?

I'm trying to create regular hexagon polygons, but when visualized on a map they are stretched vertically. This is how I do it: List hexagons = new ArrayList<>(); CoordinateReferenceSystem sourceCRS = DefaultGeographicCRS.WGS84; …
Ante
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DatumFactory is not an ImageIO SPI class

We are migrating our project to java 9 and I am getting this exception while using geotools: java.lang.IllegalArgumentException: org.opengis.referencing.datum.DatumFactory is not an ImageIO SPI class at…
Gent
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(Geotools library) How to convert Korean coordinates (EPSG:5179) to Decimal Degree coordinates (EPSG:4326)

I have a problem when converting from Korean 2000 Coordinates System (EPSG:5179) to Decimal Degree (EPSG:4326). We are developing Geographical Information System for Korean company. We were using Geotools library for mulitiple backend…
Sebastian Słupiński
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vectorize polygon using JTS with range lookup

I try to vectorize an image using java i.e. geotools with JAI. The code is minimal and works just fine in intelliJ InputStream stringAsStream = new ByteArrayInputStream(inputAsciiGrid.getBytes(StandardCharsets.UTF_8)); SimpleFeatureIterator…
Georg Heiler
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Add new column attribute to the shapefile and save it to database using Geotools Java

I am transforming a shapefile by adding a new column attributes. Since this task is performed using Java, the only option I know for now is using Geotools. I have 2 main concerns: 1. I am not able to figure out how do I actually add a new column…
GeoFresher
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Maven package error

I am working on a project which requires a geotools dependency. Before I was getting the following error: Exception in thread "main" java.lang.IllegalStateException: cannot initilize transformation: Authority "EPSG" is unknown or doesn't match the…
user3597555
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