-
Extracting trajectories from massive movement datasets
To explore travel patterns like origin-destination relationships, we need to identify individual trips with their start/end locations and trajectories between them. Extracting these trajectories from …
-
MapStore Release 2020.02.00
Dear Reader, We are pleased to announce the release 2020.02.00 of MapStore, our flagship Open Source WebGIS product. The full list of changes for this release can be found in the GitHub Project. This…
-
MapStore Release 2020.02.00
Dear Reader, We are pleased to announce the release 2020.02.00 of MapStore, our flagship Open Source WebGIS product. The full list of changes for this release can be found in the GitHub Project. This…
-
JTS OverlayNG - Noding Strategies
In a previous post I unveiled the exciting new improvement in the JTS Topology Suite called OverlayNG. This new implementation provides significant improvements to the core function of spatial overla…
-
Fixing and improving long-standing FDO Toolbox annoyances
After 5+ years of inactivity, the FDO Toolbox project has roared back to life.What prompted this burst of development activity? Years upon years of eating my own dogfood in my day job. Every-time I ne…
-
JTS Overlay - the Next Generation
In the JTS Topology Suite, Overlay is the general term used for the binary set-theoretic operations intersection, union, difference and symmetric difference. These operations accept two geometry inpu…
-
Health SDI, Simple APIs and Web Map Clients for COVID Tracking
Dear Reader, Sharing of health data has become one of the most important data sharing activities in the last months. The general population and authorities need to know the current situation not onl…
-
Maximum Inscribed Circle and Largest Empty Circle in JTS
There is often a need to find a point which is guaranteed to lie in the interior of a polygon. Uses include placing cartographic labels, and using the point as a proxy for polygon containment or over…
-
MapStore Release 2020.01.01
Dear Reader, We are pleased to announce the release 2020.01.01 of MapStore, our flagship Open Source webgis product. The full list of changes for this release can be found here, but the most interesti…
-
PostGIS 3: Paralelismo
A consulta paralela faz parte do PostgreSQL desde 2016 com o lançamento da versão 9.6 e, em teoria, o PostGIS deveria se beneficiar do paralelismo desde então. Na prática, a natureza complexa do PostG…
