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

For feedback and queries write to us at

bhuvan@nrsc.gov.in

Thank you…

Questions?