Changes between Version 20 and Version 21 of GSoC/2017/SOSInGRASS

Timestamp:

08/30/17 13:45:02 (7 years ago)

Author:

pesekon2

Comment:

--

GSoC/2017/SOSInGRASS

@@ -163 +163 @@
 * uses yet existing timestamped layers instead of creating new ones
 
-v.to.rast
+t.vect.to.rast
 * created
 
@@ -171 +171 @@
 
 
+  === Final Report ===
+
+**Project Title:**  
+
+SOS tools in GRASS GIS
+
+**Organization:**  
+
+Google Summer of Code 2017  
+
+Open Source Geospatial Foundation (OSGeo)  
+
+GRASS GIS
+
+**Abstract:**  
+
+Intended modules would enable the user to create a vector, a raster based on
+some aggregations and create a space time vector or raster dataset, everything
+directly from user's access to the SOS server. t.vect.to.rast would also allow
+the user to convert a space time vector dataset into a raster dataset. The user
+should be also allowed to get the capabilities to get info about sensors from
+these modules and filter the results.
+
+**Pre-GSoC:**  
+GRASS GIS didn't have any module to work with Sensor Observation Service (SOS).
+When the user wanted to use data from his SOS server, he had to access them
+through OWSLib, convert them into GRASS GIS or OGR supported format ad then
+import it somehow to GRASS GIS as one huge file.
+
+**Added value:**   
+v.in.sos imports data from SOS server as a vector map to GRASS GIS. It creates
+one layer for each offering and observed property.  
+
+r.in.sos imports data from SOS server as a raster maps to GRASS GIS. It creates
+new raster map for each timestamp.   
+
+t.vect.in.sos imports data from SOS server to GRASS GIS as a spatio-temporal
+vector dataset. It creates new stvds for each offering and observed property
+(created from one vector map as an intermediate).  
+
+t.rast.in.sos imports data from SOS server to GRASS GIS as a spatio-temporal
+raster dataset. It creates new strds for each property and each procedure
+(registered from raster maps created as intermediates).  
+
+t.vect.to.rast doesn't import data from SOS server to GRASS GIS. It converts
+a space time vector dataset into a space time raster dataset.
+
+User is allowed to use some aggregations and granularity to filter data in all
+modules.
+
+**Continued Work:**  
+There are some issues or possible enhancements in the modules.  
+
+v.in.sos uses timestamps as column names for each layer. The problem is that it
+is not possible to have more than 3000 columns in SQLite table (GRASS GIS
+attribute table) without SQLite recompilation. It is little bit solved by
+granularity and this module isn't so necessary when there is t.vect.in.sos, but
+it is still useful for some purposes and this is really lack.  
+
+t.vect.to.rast is working, but if you take a look at t.rast.to.vect, you can
+see much more options. It would be great to involve them also into
+this module.  
+
+It would be also great to have a flag for ignoring empty procedures in all
+the SOS modules.
+
+**Link:**  
+
+The modules github repository:
+[https://github.com/pesekon2/GRASS-GIS-SOS-tools
+
+(they should be moved into the official GRASS GIS add-ons repository in
+the future)
+
+One image to show how can visualized sensors look on the OSM map:
+https://raw.githubusercontent.com/pesekon2/GRASS-GIS-SOS-tools/d566c868a50f12ba6fc4e1d6b953e9708e4b0061/image_vector_import.png
+
+**What do you need to test these !AddOns?**
+
+To use this module, you need your OWSLib up-to-date. If you don't have it,
+please install it from its
+[https://github.com/geopython/OWSLib github repository].
+
+Because of granularity options, you need to be using GRASS > 7.2 to have access
+to some functions.