Description
You have a Shapefile or some GML and you just want to see whether the geometry looks right, merge two layers, or compute a buffer. The software that does that is usually either a four-figure commercial licence or a package that takes an afternoon to install and configure. OpenJUMP is neither: a few dozen megabytes of Java that unpacks and runs, opens layers and edits geometry directly, then writes them back — no database, no services.
Forked from the original JUMP project and maintained by the community for two decades, it has stayed the handy tool in open-source GIS for vector editing and geometry operations. Cross-platform with portable builds for Windows, macOS and Linux, an open plugin interface, and a Plus edition that bundles extra raster and analysis plugins.
Vector I/O: Shapefile, GML, GeoJSON, DXF, PostGIS and WFS open and save directly, with a layer manager for ordering, styling and visibility.
Geometry editing: draw and modify points, lines and polygons, with vertex-level add/remove/drag, feature merge and split and topology fixes, while the attribute table stays in sync.
Spatial analysis: buffers, convex hulls, union, difference, dissolve and overlay, plus triangulation and offset curves — select a layer and pick the operation from the menu.
Attribute and spatial queries: filter features by attribute condition or by spatial relationship such as intersects, contains or within distance, saving results straight to a new layer.
Styling and thematic maps: colour-grade by attribute value, label from a field, set fills and line styles to produce a presentable thematic map quickly.
Plugin extensions: an open plugin API, with raster handling and database connectors preinstalled in the Plus build, and custom Java plugins loaded by dropping them into the folder.
Portable: official Portable packages ship with launch scripts and run wherever Java is installed, so the whole working setup copies to another machine.
Forked from the original JUMP project and maintained by the community for two decades, it has stayed the handy tool in open-source GIS for vector editing and geometry operations. Cross-platform with portable builds for Windows, macOS and Linux, an open plugin interface, and a Plus edition that bundles extra raster and analysis plugins.
Features
Vector I/O: Shapefile, GML, GeoJSON, DXF, PostGIS and WFS open and save directly, with a layer manager for ordering, styling and visibility.
Geometry editing: draw and modify points, lines and polygons, with vertex-level add/remove/drag, feature merge and split and topology fixes, while the attribute table stays in sync.
Spatial analysis: buffers, convex hulls, union, difference, dissolve and overlay, plus triangulation and offset curves — select a layer and pick the operation from the menu.
Attribute and spatial queries: filter features by attribute condition or by spatial relationship such as intersects, contains or within distance, saving results straight to a new layer.
Styling and thematic maps: colour-grade by attribute value, label from a field, set fills and line styles to produce a presentable thematic map quickly.
Plugin extensions: an open plugin API, with raster handling and database connectors preinstalled in the Plus build, and custom Java plugins loaded by dropping them into the folder.
Portable: official Portable packages ship with launch scripts and run wherever Java is installed, so the whole working setup copies to another machine.
