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geomesa
GeoMesa is a suite of tools for working with big geo-spatial data in a distributed fashion.
rasterframes
Geospatial Raster support for Spark DataFrames
jts
The JTS Topology Suite is a Java library for creating and manipulating vector geometry.
proj4j
Java port of the Proj.4 library for coordinate reprojection
geowave
GeoWave provides geospatial and temporal indexing on top of Accumulo, HBase, BigTable, Cassandra, and DynamoDB
geotrellis
GeoTrellis is a geographic data processing engine for high performance applications.
udig-platform
uDig parent project containing all core components. More plugins can be found in community repos: http://github.com/uDig-Community
spatial4j
LocationTech Spatial4j: A Geospatial Library for Java
sfcurve
LocationTech SFCurve is a Scala library for the creation, transformation, and querying of space-filling curves