This is the presentation on "Thematic Data Dissemination on bhuvan" presented at FOSS 4G India 2012 conference at hyderabad

1. Bhuvan
Multi Resolution
Thematic Data Dissemination on Bhuvan
Gateway to Indian Earth Observation
Societal Applications
Thematic Vectors
Bhuvan Cell
National Remote Sensing Centre
Hyderabad
http://bhuvan.nrsc.gov.in

2. Gateway to Indian EO Data Products & Services
Project Specific
“Multi theme and Multi User
Utilities”
Visualisation Data Archive Thematic Services Geo-Processing
• EO Data/ Products Exceeds 14 Terrabytes
• 19000 Unique users / month
• ~ 70000 EO image downloads since Sep 2011
Website of the Month – Dec’2010

3. NRSC Open EO Data Thematic Services
“OGC Web Services (WMS, WMTS)
Archive towards interoperability”
Released on 29 Sep 2011 Released on 17 Dec 2011
 Cartosat-1:DEM: 1 arc Sec  LULC – 1:50000 (2004-05)
 Oceansat-2:OCM: NDVI, VF (2011):1Km  LULC – 1:250000 (7 cycles – 2004-05 to
2010-11)
 RS-1:AWiFS Ortho
(2008,2009,2010):56m  Wasteland – 1: 50000 (2008-09)
 RS-1:LISS III Ortho (2008-09, 2011):24m  Urban Landuse – 1:10000 (2006-07)
 Flood Hazard Layer (Assam : 1998-
2007)
 Flood Annual Layer (Assam & Bihar :
1998-2010)
Data Downloads
 CartoDEM 20912  Bhuvan Clip & Ship on 11 Apr 2012
 AWiFS Ortho 7339  105 MOU signed and Data delivered
 LISS III Ortho 47222 (world institute of sustainable energy, NIO,
 NDFI, VF 579 Bangalore Univ, Pune Univ, National
Research centre for Agrofor etc )
Total – 76052 (till 08 Oct’12) 475 enquiries received

4. Thematic Datasets
 Land use
The way in which, and the
purposes for which, human
beings employ the land
and its resources
 Land cover
The physical state of the
land surface

5. Thematic Datasets
Urban Land Use Wasteland
Mapping of Thematic assets on a scale of Mapping the wasteland extent of the
1:10,000 for the city and environs country

6. Thematic Datasets
Flood Hazard Flood Annual Layers
Flood Hazard Zonation maps derived Mapping and monitoring flood
from 10 yrs of flood inundation layers

7. Thematic Data Dissemination
 Using OGC Web services
 Web Map Service
Provides a simple HTTP interface for requesting geo-registered map
images
 Web Map Tile Service
Extension of WMS where rendering is in the form of tiles
Fetch the tiles asynchronously and completes the request to fill a single
view

8. Software tools
 PostgreSQL  PHP (Hypertext
 PostGIS Preprocessor)
 GeoServer  JavaScript
 GeoWebCache  Apache Webserver
Dissemination as OGC Web Services
…Enabling Interoperability

9. System Implementation
PHP + JavaScript (Open Apache Server (web server)
Layers API ) viewer
WMS WMTS
Geo-WebCache
PostgreSQL
+ PostGIS
Geo Server

10. Results
The web-interface for this Thematic Datasets
Dissemination is available at –
http://bhuvan.nrsc.gov.in
http://bhuvan-noeda.nrsc.gov.in/theme

11. Accessing Thematic datasets as Web Services
Using these GetCapability URLs, users can access thematic layers and plot on any
compatible clients/Web browsers (QGIS,Gaia,OpenLayers, ArcGIS etc)
Tutorials are available at http://bhuvan-forum.nrsc.gov.in/guest/viewtopic.php?f=3&t=33

12. Get Data
Allows the users to place request for digital database
GDAL library is used to facilitate the user to do the clip and ship through FTP configured
using Apache FTP

13. Statistics tool under Bhuvan Thematic services
Statistics tab helps the user to view the statistics of the selected geography for the
specific theme in both tabular and graphic form
Open source PHP charting library is used to create Pie-charts

14. Analysis tool under Bhuvan Thematic services
Users can define their Area of Interest (AOI), and analyze to get the output (statistics)
PostGIS functions ‘ST_IsValid’ is used for checking the validity of AOI and ‘ST_Intersects’
is used to process the AOI

15. Query shell example in Bhuvan Thematic services
Create a simple query using AND, OR, NOT operators and get the spatial output
Request is processed at PostgreSQL/PostGIS and the resulting layer is dynamically
published using REST API of Geoserver

16. Metadata
Data about data
Based on National Spatial Data Infrastructure (NSDI)-2.0 metadata standard

17. Overlay of other Thematic Layers
The overlay layers include – Administrative Boundaries, Transportation layers, Water
bodies, Rediff navigation map and other themes.
Opacity vary from 0.1 to 0.9 to understand the temporal changes
Add own WMS layer using ‘Add Button’

18. Conclusion
 Thematic data dissemination through Bhuvan helps the users to visualize and
consume the thematic datasets as WMS and WMTS services which
leverages the data access across the web for further value addition.
 It facilitates the researchers, planners, administrators etc to use these vital
information towards societal good
Currently at an average there are around 150 unique visitors/day to
Bhuvan-Thematic Services portal

19. Future Prospects
 Extension to complex query based on multiple thematic layers
 Query on the area of interest created through buffer on line, point or polygon
 Querying facility for the Bhuvan mobile version having dashboard
 Integration of more Thematic Datasets like Geomorphology, Land Degradation

20. Thank you…
Questions?
For feedback and queries write to us at
bhuvan@nrsc.gov.in