Tuesday, June 21, 2016

GeoServer

GeoServer is a Java-based software server that allows users to view and edit geospatial data.  User must ensure JAVA is running on the computer before installing Geo Server and Apache Tomcat must be installed. 

Step 1,

Download Geo server (Stable version) from following link

http://geoserver.org/download/


Step 2,

Make sure Java is running on the computer or else install Java using JAVA SDK. 

Step 3,

We must create runtime environment for Java,

Go to My computer properties-  Advance system settings - Environment variables - New user variable 

Variable Name - JRE_HOME
Variable Value - C:\Program Files\Java\jre1.8.0_60





Step 3,

Copy Apache Tom Cat in to "C" drive



Step 4,

Copy and paste geoserver.war file into tomcat webapps. If the .war file is not available in the geoserver folder download it in the following link.
http://geoserver.org/release/stable/






Step 5,

Run startup.bat file in the Apache bin using command prompt.



Step 6,

Do not close the Tomcat and type following link in your web browser.

localhost:8080/geoserver/web

user name - Admin
password - Geoserver









Monday, June 6, 2016

Spatial Temporal analysis in QGIS

When we need to analyse spatial data which are changing it's locations with the time we have to use temporal analysis tools. Also this refers as tracking analysis. QGIS plugin "Time Manager" allows users to analyze  spatial data with the time. 


Step 1,

Open QGIS - Plugins - search "Time Manager" - Install the plugin



Step 2,

Add vector data layer which contain time/date as attribute



Step 3,

Open Time Manager plugin



Step 4,

Click on the "Settings' button in the Time manager and add data layer. then select the field where time values are stored







Step 5,

Change the time duration as required (Min, hours, day etc...)

 

Step 6,

Now we can run the analysis, just click on the play button


Step 7,

Click export button to export the analysis as video file



Temporal Analysis in ArcGIS

When we need to analyse spatial data which are changing it's locations with the time we have to use temporal analysis tools. In ArcGIS we can use Time slider to perform temporal analysis.


Step 1,

To do the temporal analysis we required spatial data which is having time or a date as attribute.


Step 2,

In ArcGIS shape file we cannot store time though we can store dates. hence we can create personal Geodatabase and import our shapefile. Then open shapefile in Access database which allows users to insert time together with the date in a same filed. 



Step 3,

We are using ArcGIS Time Slider for this practical, we can go to tool bar in the ArcGIS and access to time slider, if you currently not added any layer which is not having time attributes this tool remain inactive. 

 

Step 4,

We have to enable the time for the layer. Right click on the layer- Properties - Time. 


Step 5,

Now time slider is active and we can start temporal analysis. 


Step 6,

Click on the Time Slider to open the tool,


Step 7,

Users can select time field, field format, time step intervals (Minutes, Hours, Days etc...)and have to calculate layer time extent, and possible to select required time zone by clicking on the "options " button in the Time Slider








Step 8,

when all the adjustments been done we can run the Time slider which will display the locations depending on the time/Date,



Step 9,

To keep remain the displayed locations also we have to tick on "Display Data Cumulatively" option in the layer properties. 





Step 10, 

We can export temporal analysis as video. click on the video button the time slider and export the video.