New answers tagged algorithm
Look at the scw answer in Simplifying geometries (generalization) ...Douglas-Peucker, which is the default algorithm used in software such as PostGIS (i.e. GEOS) via St_Simplify, ArcGIS via Generalize and GRASS via v.generalize... but: GRASS supports a number of different algorithms, as explained in the help page for v.generalize. And the other ...
GeographicLib (written by me) includes a utility GeoConvert to convert between UTM/MGRS/Lat+Long. If you want to try it out before downloading it, use the online version of GeoConvert. The algorithm used by GeographicLib is an extension of Krüger's 1912 series. The derivation is given in this 2011 paper in the Journal of Geodesy. You can download a ...
Welcome to GIS.SE. The go-to tool for MGRS is usually GeoTrans. If you want a nice map viewer that supports display in both MGRS and Lat/Long (and UTM), try FalconView (which uses GeoTrans underneath). If you are on Windows, there are pre-built installers. Make sure you get the version that matches your host operating system (32 or 64 bit) and that you ...
This might be speaking outside of geo-spatial lexicon, but a many-to-many relationship is best done with an associative table. Creating a third table with unique ids and creating inside this table all relative relationships and then joining this third table up to one of the original tables by a corresponding field.
In the absence of a more detailed description of your system, I would suggest to use Versioning when there are multiple editors. Study this document which explains every thing you need to know with the same parcel division example. If you use above given method you do not have to import or export the data.
Top 50 recent answers are included