Bhuvan Multi Resolution Societal Applications Thematic Vectors http://bhuvan.nrsc.gov.in Thematic Data Dissemination on Bhuvan Gateway to Indian Earth Observation Bhuvan Cell National Remote Sensing Centre Hyderabad
May 11, 2015
BhuvanMulti Resolution
Societal Applications
Thematic Vectors
http://bhuvan.nrsc.gov.in
Thematic Data Dissemination on Bhuvan
Gateway to Indian Earth Observation
Bhuvan Cell
National Remote Sensing Centre
Hyderabad
Gateway to Indian EO Data Products & Services
Visualisation Data Archive Thematic Services Geo-Processing
Project Specific
Website of the Month – Dec’2010
• EO Data/ Products Exceeds 14 Terrabytes
• 19000 Unique users / month
• ~ 70000 EO image downloads since Sep 2011
“Multi theme and Multi User
Utilities”
Cartosat-1:DEM: 1 arc Sec
Oceansat-2:OCM: NDVI, VF (2011):1Km
RS-1:AWiFS Ortho
(2008,2009,2010):56m
RS-1:LISS III Ortho (2008-09, 2011):24m
LULC – 1:50000 (2004-05)
LULC – 1:250000 (7 cycles – 2004-05 to
2010-11)
Wasteland – 1: 50000 (2008-09)
Urban Landuse – 1:10000 (2006-07)
Flood Hazard Layer (Assam : 1998-
2007)
Flood Annual Layer (Assam & Bihar :
1998-2010)
NRSC Open EO Data
Archive
Thematic Services
“OGC Web Services (WMS, WMTS)
towards interoperability”
Released on 17 Dec 2011
Bhuvan Clip & Ship on 11 Apr 2012
105 MOU signed and Data delivered (world institute of sustainable energy, NIO,
Bangalore Univ, Pune Univ, National
Research centre for Agrofor etc )
475 enquiries received
Data Downloads
CartoDEM 20912
AWiFS Ortho 7339
LISS III Ortho 47222
NDFI, VF 579
Total – 76052 (till 08 Oct’12)
Released on 29 Sep 2011
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
Urban Land Use Wasteland
Thematic Datasets
Mapping of Thematic assets on a scale of
1:10,000 for the city and environs
Mapping the wasteland extent of the
country
Flood Hazard Flood Annual Layers
Thematic Datasets
Flood Hazard Zonation maps derived
from 10 yrs of flood inundation layers Mapping and monitoring flood
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
Software tools
PostgreSQL
PostGIS
GeoServer
GeoWebCache
PHP (Hypertext
Preprocessor)
JavaScript
Apache Webserver
Dissemination as OGC Web Services
…Enabling Interoperability
System Implementation
PHP + JavaScript (Open
Layers API ) viewerApache Server (web server)
Geo-WebCache
WMS WMTS
PostgreSQL
+ PostGISGeo Server
The web-interface for this Thematic Datasets
Dissemination is available at –
http://bhuvan.nrsc.gov.in
http://bhuvan-noeda.nrsc.gov.in/theme
Results
Using these GetCapability URLs, users can access thematic layers and plot on any
compatible clients/Web browsers (QGIS,Gaia,OpenLayers, ArcGIS etc)
Accessing Thematic datasets as Web Services
Tutorials are available at http://bhuvan-forum.nrsc.gov.in/guest/viewtopic.php?f=3&t=33
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
Get Data
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
Statistics 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
Analysis tool under 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
Query shell example in Bhuvan Thematic services
Data about data
Based on National Spatial Data Infrastructure (NSDI)-2.0 metadata standard
Metadata
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’
Overlay of other Thematic Layers
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
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