GIS coaching for territorial management.
We have previously seen how to correct Landsat images for TOA (top-of-atmosphere)reflectance. Here is a diagram that will help us understand the following: Therefore the reflectance we have calculated is the% of light reflected to the…
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Previously we discussed how to adjust Landsat images for the reflectance TOA (top-of-atmosphere). Here is a diagram that will help us to understand what happens next: Therefore the reflectance we have calculated is the% of light…
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Pre-processing functions are operations that are typically required before performing the main analysis and retrieval of the information. Pre-processing operations are divided into radiometric corrections and geometric corrections. Radiometric corrections include, but are not limited to,…
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Pre-processing functions are operations that are typically required before performing the main analysis and retrieval of the information. Pre-processing operations are divided into radiometric corrections and geometric corrections. Radiometric corrections include, but are not limited to,…
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Firstly, a warning: this tutorial is not intended for users whose job is spatial image processing. It is intended for GIS users who need to engage in image processing in order to improve their data. The…
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Firstly, a warning: this tutorial is not intended for those users whose job is spatial image processing . It is intended for GIS users who need to engage in image processing in order to improve their…
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Even if Google does not advertise, you should be aware that the Google Earth Pro license has become free since the beginning of 2015. Therefore, you can download, install and use Google Earth Pro without limitations,…
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If you import or create svg symbols to use in QGis you will noticed that the colour change options and outline of these symbols are disabled in QGis. In fact, these settings are hard-coded in the…
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Usually, all layers of geographic data have the description of the coordinate system. Unfortunately, this is not always the case. In general, the problem greatly increases with the fact that, usually, it is quite (or completely)impossible…
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In previous articles, we have discussed the geometry validation tools with ArcGis,Spatialite / Postgis, FME and Geomedia. We still have to discuss this feature with QGis. You will see, it is not easy to find it!…
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