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geostatistics [2018/02/14 16:22]
qcbs
geostatistics [2020/02/26 14:24]
qcbs [Digitize a polygon defining the boundary of your study site]
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 ==== Books ==== ==== Books ====
-  * [[http://​link.springer.com/​book/​10.1007/​978-0-387-78171-6/page/1|Applied spatial data analysis with R, Bivand, Pebesma et Gómez-Rubio.]] - Provides a good overview of spatial statistical tools in R. Contains a good chapter on geostatistics.  +  * [[https://​link.springer.com/​book/​10.1007/​978-1-4614-7618-4|Applied spatial data analysis with R, Bivand, Pebesma et Gómez-Rubio.]] - Provides a good overview of spatial statistical tools in R. Contains a good chapter on geostatistics.  
-  * [[http://​www.amazon.ca/​Geostatistics-Natural-Resources-Evaluation-Goovaerts/​dp/​0195115384|Geostatistics for Natural Resources Evaluation, Pierre Goovaerts.]] - Very good book, which provices ​a more in-depth coverage of geostatistical theory. ​+  * [[http://​www.amazon.ca/​Geostatistics-Natural-Resources-Evaluation-Goovaerts/​dp/​0195115384|Geostatistics for Natural Resources Evaluation, Pierre Goovaerts.]] - Very good book, which provides ​a more in-depth coverage of geostatistical theory. ​
   * [[http://​www.lu.lv/​materiali/​biblioteka/​es/​pilnieteksti/​vide/​A%20Practical%20Guide%20to%20Geostatistical%20Mapping%20of%20Environmental%20Variables.pdf|A Practical Guide to Geostatistical Mapping of Environmental Variables (PDF)]]   * [[http://​www.lu.lv/​materiali/​biblioteka/​es/​pilnieteksti/​vide/​A%20Practical%20Guide%20to%20Geostatistical%20Mapping%20of%20Environmental%20Variables.pdf|A Practical Guide to Geostatistical Mapping of Environmental Variables (PDF)]]
   * [[http://​cg.ensmp.fr/​bibliotheque/​public/​MATHERON_Ouvrage_00167.pdf|Georges Matheron - The theory of regionalized variables and its application (PDF).]] - Original text estbalishing the basic foundations of geostatistics. ​   * [[http://​cg.ensmp.fr/​bibliotheque/​public/​MATHERON_Ouvrage_00167.pdf|Georges Matheron - The theory of regionalized variables and its application (PDF).]] - Original text estbalishing the basic foundations of geostatistics. ​
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 You can digitize the boundary of your study site from a Google Satellite layer by following the following steps: ​ You can digitize the boundary of your study site from a Google Satellite layer by following the following steps: ​
   - Open QGIS.    - Open QGIS. 
-  - Activate ​the '​OpenLayers ​Plugin' in the list of Extensions +  - Install and activate ​the QuickMapServices ​Plugin= 
-  - Add a Google Satellite layer by using the OpenLayers ​extension (Web/OpenLayers Plugin). +  - Add a Google Satellite layer by using the QuickMapServices ​extension (Web/QuickMapServices). You might need to enable additional providers in the Plugin settings 
-  - Note that the CRS of the canvas is now '​Google Mercator'​ (WGS 84 / Pseudo mercator)+  - Note that the CRS of the canvas is now WGS 84 / Pseudo mercator ​and units are in meters
   - If you have other vector layer that can help you define the limits of your study area, you can add them to the canvas by clicking on the 'add vector layer' icon.   - If you have other vector layer that can help you define the limits of your study area, you can add them to the canvas by clicking on the 'add vector layer' icon.
   - Digitize the zone defining your study area. You first need to add a new polygon shapefile layer under Layer>​New>​New Shapefile layer. Specify the proper CRS depending on the extent of your study area and specify a name for your layer. It is always preferable to work with a reference system that uses meters as units, such as UTM (medium extent), MTM (small extent in Quebec) or Lambert (large extent). Refrain from using a latitude/​longitude system. ​   - Digitize the zone defining your study area. You first need to add a new polygon shapefile layer under Layer>​New>​New Shapefile layer. Specify the proper CRS depending on the extent of your study area and specify a name for your layer. It is always preferable to work with a reference system that uses meters as units, such as UTM (medium extent), MTM (small extent in Quebec) or Lambert (large extent). Refrain from using a latitude/​longitude system. ​