Re: [datameet] Converting maps in pdfs to actual shapefiles/geojsons

[Nikhil VJ]

Hi Vaidya,

You might be able to skip the manual tracing process that Devdatta linked to
 and
pull out vectors directly, if your PDFs are made that way.

Rajesvari Parasa  has successfully
turned Delhi development plan's PDF into shapefiles.

You can read the discussion about it here:
https://groups.google.com/g/datameet/c/37uN8xnWrK0/m/2axI7AB-AQAJ

Relevant snippet:

1. Extracting from PDF
- It's one of those PDFs exported from Autocad or so where you can see
multi-layers and turn them on or off.
- Rajesvari used a command-line GIS tool called "ogr2ogr" to extract
individual layers from the PDF into .geojson shapefiles.
- There was a tricky bit where the output lat-longs were all like
(716882.20,3166456.28) - a different CRS and we didn't know which.
- I used http://projfinder.com/ to find it, then Rajesvari included CRS
conversion into the ogr2ogr commands to produce proper shapefiles.
- You can see all that in this repo:
https://github.com/draftmpd41/layers_draft_delhi_master_plan_2041 - see the
.bat file for the ogr2ogr commands



--
Cheers,
Nikhil VJ
https://nikhilvj.co.in


On Wed, Nov 30, 2022 at 9:56 AM Devdatta Tengshe 
wrote:

> Hi Vaidya,
>
> This excellent post by Nikhil would be a good starting point:
> https://groups.google.com/g/datameet/c/BGB-UeJqhpA/m/SFl4OgF9AgAJ
>
> Regards,
> Devdatta
>
>
> On Wed, 30 Nov 2022 at 08:49, Vaidya  wrote:
>
>> Hi all,
>>
>> Wanted to know if it is possible to convert maps put out in pdfs to map
>> files (shapefiles, geojsons or kml).
>> This is regarding the sewage and water lines put out by BWSSB.
>> The files can be found here:
>> https://bwssb.karnataka.gov.in/info-2/BWSSB+GIS+MAP+Information/en
>>
>> Thanks,
>> Vaidya
>>
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>> 
>> .
>>
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> 
> .
>

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Re: [datameet] Converting maps in pdfs to actual shapefiles/geojsons

[Devdatta Tengshe]

Hi Vaidya,

This excellent post by Nikhil would be a good starting point:
https://groups.google.com/g/datameet/c/BGB-UeJqhpA/m/SFl4OgF9AgAJ

Regards,
Devdatta


On Wed, 30 Nov 2022 at 08:49, Vaidya  wrote:

> Hi all,
>
> Wanted to know if it is possible to convert maps put out in pdfs to map
> files (shapefiles, geojsons or kml).
> This is regarding the sewage and water lines put out by BWSSB.
> The files can be found here:
> https://bwssb.karnataka.gov.in/info-2/BWSSB+GIS+MAP+Information/en
>
> Thanks,
> Vaidya
>
> --
> Datameet is a community of Data Science enthusiasts in India. Know more
> about us by visiting http://datameet.org
> ---
> You received this message because you are subscribed to the Google Groups
> "datameet" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to datameet+unsubscr...@googlegroups.com.
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> 
> .
>

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Re: [datameet] water bodies data required for solving River Encroachment problem in Chennai

[Arun Ganesh]

Hi Kaushik, here's a link to a live query of water features in Chennai
mapped on OSM https://overpass-turbo.eu/s/1oo4 . You can export them as a
geojson.
Hope this is useful as a start.

On Tue, Nov 29, 2022 at 3:16 PM Kaushik Roy 
wrote:

> Hi friends,
>
> Recently I have taken up a project to deal with the huge problem of river
> encroachment in Chennai, Tamil Nadu.
> https://timesofindia.indiatimes.com/city/chennai/drive-begins-to-free-water-bodies-of-encroachments/articleshow/89534992.cms
> . Please suggest what data we might need for this. I was thinking to start
> with water bodies data. If you can point me to it it would be great.
>
> Thanks!
> Roy
>
> --
> Datameet is a community of Data Science enthusiasts in India. Know more
> about us by visiting http://datameet.org
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> 
> .
>

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[datameet] Converting maps in pdfs to actual shapefiles/geojsons

[Vaidya]

Hi all,

Wanted to know if it is possible to convert maps put out in pdfs to map
files (shapefiles, geojsons or kml).
This is regarding the sewage and water lines put out by BWSSB.
The files can be found here:
https://bwssb.karnataka.gov.in/info-2/BWSSB+GIS+MAP+Information/en

Thanks,
Vaidya

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[datameet] Jaipur Development authority Drainage and sewer maps

[akshay...@gmail.com]

Greetings to everyone!
I've been working on the dynamics of urban flooding. I need the digitized 
maps of the drainage and sewer network of the Jaipur Municipal Corporation, 
which is managed by the Jaipur Development Authority.
Any leads would be greatly appreciated.



Regards
*Akshay*

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[datameet] water bodies data required for solving River Encroachment problem in Chennai

[Kaushik Roy]

Hi friends,

Recently I have taken up a project to deal with the huge problem of river 
encroachment in Chennai, Tamil 
Nadu. 
https://timesofindia.indiatimes.com/city/chennai/drive-begins-to-free-water-bodies-of-encroachments/articleshow/89534992.cms
. Please suggest what data we might need for this. I was thinking to start 
with water bodies data. If you can point me to it it would be great.

Thanks!
Roy

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