[Talk-in] Id editor on Bhuvan

[Shekhar Krishnan]

This is an important question now that we've established that NSRC/ISRO 
have working wms, tiles and downloads for serving imagery via Bhuvan, 
and also that they're apparently using ID for tagging.

The data policy statements on bhuvan.nsrc.gov.in are, a bit 
frustratingly, scattered in different places on their website. I have 
pasted below the relevant sections related to the terms of use of their 
web services.

Since NSRC/ISRO primarily has other government agencies as its clients, 
the easiest statements to find pertain to acquisition and onward 
dissemination by appointed distributors, not by web developers and users.

http://bhuvan.nrsc.gov.in/bhuvan/datapolicy
http://bhuvan.nrsc.gov.in/bhuvan/PDF/cartosat1.pdf

Via Bhuvan, these agencies now aim to reach a wider "user community" 
directly via the portal "to promote the development of innovative 
applications that will maximize the utilization of Earth Observation 
(EO) satellite data generated by our satellites, emerge as a critical 
tool for societal development and in nation building."

http://bhuvan.nrsc.gov.in/bhuvan/NRSC
http://bhuvan.nrsc.gov.in/bhuvan/scientists

Bhuvan's web portal and services are established under NOEDA, which 
stands for NSRC Open Earth Observation Data Archive, under National 
Remote Sensing Centre (NSRC). NOEDA has its terms of use and citation 
stated clearly in the FAQs and Policy which are pop-ups on 
http://bhuvan.nrsc.gov.in/data/download/index.php :

"Terms of uses and Citation Policy:

"1. NRSC/ISRO grants only single user license for the use of Bhuvan - 
Thematic Services from this web portal without requiring specific 
permission.
"2. NRSC grants the user a limited, non-exclusive, non-transferable 
license with the following terms and conditions.
"i. User can use the services subjected to it is being reproduced 
accurately and not being used in a derogatory manner or in a misleading 
context;
"ii. User can use the services for his/her own internal needs and 
application (including on an internal computer network);
"iii. User can use the services to produce Value Added Services and/or 
derivative works;
"iv. User can make the services and/or any Value Added Services as per 
their requirement use on behalf of the user;
"v. The user shall indemnify NRSC for any loss; claims and conclusions 
drawn out of the direct use of the data or value added services 
generated using the data/service by them or by any other third party. 
NRSC disowns liability for issues that might emerge due to use of data 
for any commercial and/or legal purposes.
"vi. The permission to reproduce this material does not extend to any 
material on this site, which is explicitly identified as being the 
copyright of the third party. Authorization to reproduce such materials 
must be obtained from the copyright holders concerned.
"vii. The data and web service shall remain exclusive property of NRSC, 
ISRO. All the Copyright lies with NRSC/ ISRO for data and web services.
"viii. The user will first inform NRSC regarding any improvements and 
suggestions to be made in the data/services.
"ix. Digital databases are provided only for authorized users (at 
present Govt. to Govt. organizations in India) to facilitate advanced 
analysis and integration with their digital databases for region 
specific management issues.
"x. Users must invariably acknowledge the data and web service source 
and use. The source of the data and service will be cited as described 
in FAQ Page 'How Do I Acknowledge?'
"3. Users are encouraged to provide their feedback on services and its 
uses through online or email.

"Hyperlink Policy:
"There is no need for permission for linking directly to the information 
that is hosted on our website until unless otherwise specified. However, 
we would expect a communication from your side to inform us about any 
links provided to our site"


Clauses i-iv are quite liberal in the terms of reuse and derivative 
works, and clause v makes it clear that they have no liability for the 
same. Clauses vii and viii state the data policy for distributors, viz. 
those who obtain and disseminate their remote sensing data via the 
institutional application process.

On the more technical side, here are some of the relevant FAQs from 
Bhuvan, which while imposing a limit of twenty tiles per day to prevent 
server overload, also give instructions on how to queue up for further 
downloads:


"3. What datasets are available for download?
"The DEM derieved from Cartosat-1 with vertical accuracy of 8m at 90% 
confidence , Resourcesat-1 AWiFS data(56m) , LISS III(24m) , Vegetation 
Fraction (VF) and Normalized Difference Vegetation Index (NDVI) derieved 
from Oceansat2(OCM2), Near Real time Tropical Cyclone Heat 
Potential(TCHP) and Hyperspectral data are available for download.

"9. How can I download the data?
"To download the data(CartoDEM, AWiFS, LISSIII, HySI) from this web 
portal the user has to follow three simple steps i.e. 1) select the data 
category. 2) search the data based on various options available like 
Bounding Box based search or map sheet based search or tile based search 
or select the Area of Interest (AOI) by simple drawing in map viewer. 3) 
Register and login to system and download the data. Note: To download 
the NDVI , VF and TCHP data, user can downlaod the data by selecting the 
year and month after successful login.

"10. What is the vertical accuracy of CartDEM?
CartoDEM vertical accuracy is about 8m at 90% confidence.

"11. What is the Thematic accuracy of NDVI and VF?

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

"12. Why limited tiles are allowed for download in a day?

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.

"13. What is backlog?

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.

"14. What is download list?

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

"15. How can I locate a place of interest on map?

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.

"16. What is toposheet or mapsheet number?

"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."



S.K.
--
Shekhar Krishnan
@bombayologist
http://shekhar.cc

On Monday 18 May 2015 02:43 PM, Sajjad Anwar wrote:
> Hey Shekhar -
>
> Can we get more clarity on the license before we start using this please?
> Again, we need it in writing that this is public domain or usable for
> tracing in OpenStreetMap.
>
> We cannot use it otherwise.
>
> On Mon, May 18, 2015 at 2:39 PM, Shekhar Krishnan <shekhar at topomancy.com> wrote:
>> Nice, I finally poked at this. For those on list who don't know tiles URL
>> syntax, you can drop this URL into ID and it works great!
>>
>> http://tile1.nrsc.gov.in/tilecache/tilecache.py/1.0.0/bhuvan_imagery2/{zoom}/{x}/{y}.jpg
>>
>> The subdomain prefix "tile1" can be replaced with "tile2", "3", "4" (I guess
>> these are backup servers?)
>>
>>
>> S.K.
>>
>> On Sunday 17 May 2015 03:36 PM, Arun Ganesh wrote:
>>>
>>>
>>>
>>> On Sun, May 17, 2015 at 4:15 AM, Paul Norman <penorman at mac.com
>>> <mailto:penorman at mac.com>> wrote:
>>>
>>>      On 5/15/2015 11:39 PM, Devdatta Tengshe wrote:
>>>
>>>          As far as I know, Bhuvan uses Tilecache.py to serve out Imagery
>>>          in
>>>
>>> tiles(http://tile1.nrsc.gov.in/tilecache/tilecache.py/1.0.0/bhuvan_imagery2/10/719/456.jpg).
>>>          The catch is that this imagery is in Geographic Latlong (i.e.
>>>          EPSG:4326) and not in Web mercator
>>>
>>>      Those are standard map tiles, in Web Mercator.
>>>
>>>      You can compare http://tile.openstreetmap.org/10/719/456.png and
>>>
>>> http://tile1.nrsc.gov.in/tilecache/tilecache.py/1.0.0/bhuvan_imagery2/10/719/456.jpg
>>>      to see that they are the same area.
>>>
>>>
>>> Thanks Paul, after poking around stumbled on their full list of tile
>>> layers:
>>> http://tile1.nrsc.gov.in/tilecache/tilecache.py/1.0.0/layers
>>>
>>> bhuvan_imagery is in WGS84
>>> bhuvan_imagery2 is in web mercator
>>>
>>> The tms url for bhuvan_imagery2:
>>>
>>> tms:http://tile{switch:1,2,3,4}.nrsc.gov.in/tilecache/tilecache.py/1.0.0/bhuvan_imagery2/{zoom}/{x}/{y}.jpg
>>>
>>> <http://nrsc.gov.in/tilecache/tilecache.py/1.0.0/bhuvan_imagery2/%7Bzoom%7D/%7Bx%7D/%7By%7D.jpg>
>>>
>>>
>>>
>>>
>>> --
>>> Arun Ganesh
>>> (planemad) <http://en.wikipedia.org/wiki/User:Planemad>
>>> <http://j.mp/ArunGanesh>
>>>
>>>
>>> _______________________________________________
>>> Talk-in mailing list
>>> Talk-in at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/talk-in
>>>
>>
>> --
>> Shekhar Krishnan
>> @bombayologist
>> http://shekhar.cc
>>
>> _______________________________________________
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>
>
>

-- 
Shekhar Krishnan
@bombayologist
http://shekhar.cc