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introgis [2018/10/22 16:17]
qcbs [Exercise 6 - Using GRASS within QGIS]
introgis [2018/10/22 17:07]
qcbs [3 - Open Source GIS software]
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   * [[http://​udig.refractions.net/​|uDIG]] - An interesting and user friendly GIS written in Java for data access, editing, and viewing. It is under active development at the moment. ​   * [[http://​udig.refractions.net/​|uDIG]] - An interesting and user friendly GIS written in Java for data access, editing, and viewing. It is under active development at the moment. ​
   * [[http://​www.saga-gis.org/​|SAGA GIS]] - (System for Automated Geoscientific Analyses) A powerful GIS mostly aimed at data analysis and spatial algorithms.  ​   * [[http://​www.saga-gis.org/​|SAGA GIS]] - (System for Automated Geoscientific Analyses) A powerful GIS mostly aimed at data analysis and spatial algorithms.  ​
-  * [[http://​www.uoguelph.ca/​~hydrogeo/​Whitebox/​|Whitebox]] - Powerful software for geo-spatial analysis, modeling and remote sensing. ​+  * [[http://​www.uoguelph.ca/​~hydrogeo/​Whitebox/​|Whitebox ​GAT]] - Powerful software for geo-spatial analysis, modeling and remote sensing.  
 +  * [[https://​www.orfeo-toolbox.org/​|ORFEO toolbox]] - Open source platform for remote sensing. ​
   * [[http://​52north.org/​communities/​ilwis|ILWIS Open]] - A remote sensing and GIS software which integrates image, vector and thematic data in one package on the desktop.   * [[http://​52north.org/​communities/​ilwis|ILWIS Open]] - A remote sensing and GIS software which integrates image, vector and thematic data in one package on the desktop.
   * [[http://​www.gvsig.org/​|gvSIG]] - A GIS currently in development having a user-friendly interface, being able to access the most common formats, and featuring a wide range of tools for query, layout creation, geoprocessing,​ networks, etc.    * [[http://​www.gvsig.org/​|gvSIG]] - A GIS currently in development having a user-friendly interface, being able to access the most common formats, and featuring a wide range of tools for query, layout creation, geoprocessing,​ networks, etc. 
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 **Step 10**: Save the changes and exit editing mode. Note that only the new columns that were created are really part of the BBS_Routes_QC table. Now remove the join (from the Properties menu) to remove the yearly observations. If you see a series of NULL values in the newly computed columns, close the attribute table and open it again. ​ **Step 10**: Save the changes and exit editing mode. Note that only the new columns that were created are really part of the BBS_Routes_QC table. Now remove the join (from the Properties menu) to remove the yearly observations. If you see a series of NULL values in the newly computed columns, close the attribute table and open it again. ​
  
-**Step 11**: You will now create a continuous interpolated surface showing the distribution of ovenbirds for each period. Make sure that the map canvas uses the same CRS as that of the BBS_Routes_QC ​file. Find IDW Interpolation under the Processing Toolbox menu. Specify BBS_Routes_QC as the input vector layer and choose the column corresponding to the earliest period as the interpolation attribute field. You need to define the number of columns, number of rows and Extent to obtain an output raster with a resolution of 2km x 2km *exactly* so that you can include most of the points (you can exclude points in Northern Quebec), but without extending too much outside of the extent covered by the points. Don't hesitate to use a calculator and the image below: ​+**Step 11**: You will now create a continuous interpolated surface showing the distribution of ovenbirds for each period. Make sure that the map canvas uses the same CRS as that of the BBS_Routes_QC ​layer. Find IDW Interpolation under the Processing Toolbox menu. Specify BBS_Routes_QC as the input vector layer and choose the column corresponding to the earliest period as the interpolation attribute field. You need to define the number of columns, number of rows and Extent to obtain an output raster with a resolution of 2km x 2km *exactly* so that you can include most of the points (you can exclude points in Northern Quebec), but without extending too much outside of the extent covered by the points. Don't hesitate to use a calculator and the image below: ​
  
 {{:​raster_res.png?​200x140|}} {{:​raster_res.png?​200x140|}}