Comparing two spatial datasets statistically
Hiking & ActivitiesHow do you compare spatial distributions? To analyze the spatial distribution of attribute values (not features itself, but certain attribute values), you can divide (weigh) the values by distance to neighbors and create a frequency distribution. You can then compare that against a uniform or random distribution. What is the statistical test for spatial distribution?
Is QGIS multi-threaded?
Hiking & ActivitiesDoes QGIS use multiple cores? QGIS uses by default only one CPU core for rendering, but you can change this. Multi-threaded rendering should speed up your performance significantly! How do I enable multithreading in QGIS? To enable it, open the Options dialog, select the Rendering tab and check the Render layers in parallel using many
Check data from ArcPad
Hiking & ActivitiesWhere is Arc map data? The following steps describe how you can view your data in ArcMap: Start ArcMap, open the Catalog window, and connect to your database. Click the table in the Catalog tree to select it. To view the data, drag the table from the Catalog window to the table of contents or
What is a good world reference atlas with information for each country?
Hiking & ActivitiesWhich atlas is best for world? No atlas is more accurate than Oxford’s Atlas of the World. Combined with stunning photography, detailed charts and graphs, and crisp cartography of urban and natural locations, this volume is one of the best world atlas choices on the market. What reference book would you use to find a
Kriging inside a PostGIS database?
Hiking & ActivitiesWhy IDW is better than kriging? 3D visualization indicated that IDW is an exact interpolation, while kriging and spline are inexact interpolations. It was also revealed that kriging has the tendency to underestimate data values, compared to actual data values. Spline had the tendency to generate extreme data values along edges of the study area.
Converting selected multipart features to single parts in QGIS
Hiking & ActivitiesHow do I extract selected features in QGIS? Once the features have been selected, right click on your dataset and select the “save as” option from the menu. From the interface select the desired file format. Under encoding click the “Save only selected features” box. Click “Browse”and designate the file name and location. How do