uDig

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{{Infobox Software

| name = uDig

| logo =

| screenshot = Image:UDig.png

| caption = uDig-1.1-RC14

| collapsible =

| author =

| developer = Refractions Research

| released =

| latest release version = 2.0.0

| latest release date = {{Start date and age|2018|04|25|df=yes}}

| latest preview version = 2.2.0.RC1

| latest preview date = {{Start date and age|2020|06|23|df=yes}}

| frequently updated =

| programming language = Java

| operating system = Windows, Mac OS X, Linux

| platform =

| size =

| language =

| status =

| genre = Geographic information system

| license = EPL + BSD

| website = http://udig.refractions.net/

}}

uDig is a GIS software program produced by a community led by Canadian-based consulting company Refractions Research.{{Cite web|title=Refractions Research Expertise|url=http://www.refractions.net/expertise/|website=Refractions Research}}

uDig is based on the Eclipse platform and features full layered Open Source GIS. It is written in Java and released under EPL and BSD licences (formerly under GNU LGPL).{{Cite web|title=uDig Technical Overview|url=http://www.refractions.net/products/udig/technicaloverview/|website=Refractions Research/UDig}}

The Software has a walkthrough in Flash and also quick start directions for those who wish to complete a full version build to write plug-ins or contribute to the main build.

uDig can use GRASS for complex vector operations and also embeds JGRASS and specialized hydrology tools from the Horton Machine. It supports shapefiles, PostGIS, WMS, and many other data sources natively.

uDig is commonly used as a framework for building other GIS platforms and applications. Such applications include DIVA-GIS and DEWS – Distant Early Warning System for tsunamis.{{Cite web|title=uDig Application Gallery|url=http://udig.refractions.net/gallery/|website=Refractions Research/UDig}}