Frequently Asked Questions

1 Is the Bhuvan account creation open for all?
2 Is high resolution satellite data free for downloading
3 Free Satellite data is processed or raw ?
4 Are thematic maps available for download as shape files?
5 Point of information data cab be downloaded?
6 Can we report an error in data set ?
7 Is There any training program for users ?
8 Can I share my Data with Bhuvan ?
9 What is CartoDEM-1arc Second?
10 What is Advanced Wide Field Sensor (AWiFS) data?
11 What is Linear Imaging and Self Scanning Sensor (LISS) III data?
12 What is Vegetation Fraction(VF)?
13 What is Normalized Difference Vegetation Index (NDVI)?
14 What is the vertical accuracy of CartDEM?
15 What is the Thematic accuracy of NDVI and VF?
16 Why is there a limitation on the number of tiles I can download in a day
17 What is backlog?
18 What is download list?
19 How can I locate a place of interest on map?
20 What is toposheet or mapsheet number?
21 What is bounding box?
22 What is metadata?
23 What is a tile?
24 What is the use of Information button?
25 How DEM is created?
26 How LISS III Orthorectified data is created?
27 How AWiFS Orthorectified data is created?
28 How Vegetation Fraction(VF) map is created?
29 How is an albedo map created ?
30 How spectrally binned HySI data is created?

Is the Bhuvan account creation open for all?

Ans. Yes, anyone can signup

Is high resolution satellite data free for downloading

Ans. No, 1 meter high resolution Satellite data is for visualization. Moderate resolution satellite data eg-LISS III, AWIFS is free for downloading.

Free Satellite data is processed or raw ?

Ans. yes, Geo-referenced and orthorectified

Are thematic maps available for download as shape files?

Ans. No, But they are available to import to external sources as Web Map Services.

Point of information data cab be downloaded?

Ans. No, For information only

Can we report an error in data set ?

Ans.Yes, Please write to us at “email” along with a short description and screenshot.

Is There any training program for users ?

Ans. Yes, information is available at Bhuvan home page, for more information Write to : Email: bhuvantraining{at} nrsc[dot]gov[dot]in

Can I share my Data with Bhuvan ?

Ans.Yes, you can share your data, for more information write us to bhuvan[at] nrsc[dot]gov[dot]in

What is CartoDEM-1arc Second?

Ans.CartoDEM-1 arc second: DEM generated from Cartosat-1 Stereo data having the resolution of one arc-second (approximately 30 meters)

What is Advanced Wide Field Sensor (AWiFS) data?

Ans.This data is received from Advanced Wide Field Sensor (AWiFS) which operates in three spectral bands in VNIR and one band in SWIR with 56 metre spatial resolution and a combined swath of 730 km achieved through two AWiFS cameras.

What is Linear Imaging and Self Scanning Sensor (LISS) III data?

Ans.This data is received from Linear Imaging and Self Scanning Sensor (LISS) which operates in three spectral bands in VNIR and one band in SWIR with 23.5 metre spatial resolution and a swath of 141 km.

What is Vegetation Fraction(VF)?

Ans. Vegetation Fraction (VF) is defined as the percentage or fraction of occupation of vegetation canopy in a given ground area in vertical projection. It is a canopy bio-physical property.

What is Normalized Difference Vegetation Index (NDVI)?

Ans. Answer is correct but needs to be formatted with proper full-stops. Try to make the equation appear in next line and then continue the sentence after the equation. Like this. “The mathematical equation for area of a circle is, A=πr^2 Where, r is the radius of the circl

What is the vertical accuracy of CartDEM?

Ans. CartoDEM vertical accuracy is about 8m at 90% confidence.

What is the Thematic accuracy of NDVI and VF?

Ans. The plot between the NDVI of OCM2 vs. MODIS has given a r-squared value = 0.98.

Why is there a limitation on the number of tiles I can download in a day

Ans. As per the NRSC open data access policy, the users are allowed to download 20 tiles (10x10) per day for Cartosat1-DEM 20 tiles (10x10) per day for AWiFS and 20 tiles 15'x15' perday for LISS-III for an effective user and bandwidth management at server end.

What is backlog?

Ans. The user can download 20 tiles of Cartosat1-DEM and 20 tiles of AWiFS data (56m) in a day. If the tiles to be downloaded exceeds the limit, then the user can save his/her search results in "Backlog" list which will enable easy retrieval of search results for further download. This backlog will be available for next 7 days from the time of saving.

What is download list?

Ans. Download list is an automatic generated list of tiles downloaded by the users. If user has got any technical problem during download, he/she can again download from this list and it is available till 24 hours of data download. This list is provided to facilitate the user to avoid any duplicate download of data

How can I locate a place of interest on map?

Ans. The place name of interest can be searched through a "Find" utility given in beginning of web page. This utility will accept any place name (text) or value to latitude/longitude and will zoom into map viewer.

What is toposheet or mapsheet number?

Ans. The toposheet or mapsheet number is an index to identify the geographical area based on Latitude and Longitude of the region. The Mapsheet number used for CartoDEM and AWiFS dissemination are based Open Series Map (OSM) of Survey of India (SOI) for 1:250,000 scale and for LISS III data, it is 1:50,000 scale.

What is bounding box?

Ans. The bounding box is described by 4 numbers; the x-y coordinates of the lower-left corner of the map, followed by the x-y coordinates of the upper-right corner of the map.

What is metadata?

Ans. Metadata is defined as "data about data". The metadata describes the definition of data in an adopted standard. The metadata displayed in this portal is based on Indian NSDI (National Spatial Data Infrastructure) standard version 2.0.

What is a tile?

Ans. Tile is a minimum unit of geographic area that can be downloaded from this portal. The tile numbers are same as mapsheet/toposheet number of SOI.

What is the use of Information button?

Ans. The information button activates the tooltip option on map viewer. By activating this tool, the user can get toposheet number,bounding box and date of pass (for AWiFS,LISS-III data) on mouse hover on map viewer and to deactivate, use can use navigation button.