Archiv der Kategorie: GIS

Tipps, Tricks, GIS, Geographical Information Systems, ArcGIS, ArcMap, QGIS

ArcGIS Pro: CRS-Transformationen mit österreichbezug

Nachdem ArcGIS Pro von ESRI erwachsen wird und sukzessive vermehrt im GIS-Alltag zum Einsatz kommt, anbei ergänzend zur Serie zur Anwendung bestmöglicher Transformationsparameter zwischen dem österreichischen Bundesmeldenetz und WGS84/ETRS89 die Implementierung dieser in ArcGIS Pro (Stand Version 1.3.1).

Transformation EOSG1618 versus NTv2 AT_GIS_GRID - kleiner Unterschied
Transformation EPSG1618 (Position Vector) versus NTv2 AT_GIS_GRID – ein kleiner Unterschied

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MongoDB and geodata part 2 – getting spatial

After importing geodata from the GIS to MongoDB and creating a spatial index (part 1), the exciting (spatial) adventure starts. With „normal“ (relational) databases and their spatial extensions (Oracle spatial, PostgreSQL/PostGIS, SQLite/Spatialite,…) a lot of spatial queries and geoprocessing are possible. So let’s try to find out which adresses have to be evacuated 250m around some „event“…

QGIS_Adressen_Umkreis
How to perform a spatial query like this with MongoDB ?

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MongoDB and geodata part 1 – from Shapefile to MongoDB 3.2

MongoDB (3.2) is a kind of database-hipster at the moment – with improving support for spatial data. So it was time for me to discover some of it’s features concerning spatial data. As a GIS-user my first intention was to get some bigger simple (point) geodata into MongoDB. Part 1 covers this topic, part 2 will cover some spatial operations within MongoDB. I also want to do some performance checks between PostgreSQL/PostGIS and MongoDB related to geodata.

QGIS_mongoDB_adressen
Geodata in QGIS and MongoDB

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