GIS coaching for territorial management.
During World War I (1939-45) the British cartographic service was conveyed to produce a heaps of maps for all the conflict zones. In previous articles we have discussed projections used for the European theaters of war.…
Read More
We have discussed in previous articles in depth how to access the allies’ cartography during WWII (1939-45) at the library of the University of Texas ( http://www.lib.utexas.edu/maps ). In this article we will discuss how to…
Read More
How to communicate your work under QGis to work partners who do not have GIS tools? The most relevant option is as an html page searchable with any Internet browser. The QSGis2Web plugin provides an easy…
Read More
To set the scene, here is an excerpt from the publication ” Surveyor n ° 2087 of December 2011 “: The file of the month Safety, reliability Underground networks by Laurent Polidori (director of ESGT)…
Read More
In the previous article we discussed the SQL functions of spatial relationship . Let’s now discuss the SQL spatial processing functions. Let’s start with the difference between the notion of spatial relation and spatial treatment. The…
Read More
Following the two introductory articles, The spatial analysis with SQL: 1-Introduction , 2-the preconceived misconceptions , we will discuss the ten Postgis spatial relational functions (that you will also find when using Spatialite). As previously stated,…
Read More
In a previous article we have stated ( The analysis space with SQL: 1-Introduction ) that the most common idea is that SQL is a very good query tool on GIS tables but you must have…
Read More
I propose you a series of articles to address some ideas received on the use of the SQL language and its possibilities in the spatial analysis. To summarize the most widespread idea, the SQL language is…
Read More
With ArcGis we have a powerful tool to visualize the temporal evolution of the layers: the temporal cursor. With the Addin Dimension Explorer 1.1 these possibilities are extended to any dimensional variable. If, for example, you…
Read More
Since the release of version 10.3 a new tool that allows the search for duplicates in a layer: look for duplicates has been made available. The tool Remove the identical element allows deleting the duplicates of…
Read More