This is fantastic work Nikhil! Love how it's parametrized for easy configuration.
The backend part for citizen inputs is especially interesting and would really complete the whole loop for so many such geospatial applications. The moderation of such content is definitely a pain and something i keep thinking about. It may be helpful just to have it hosted as a demo for the platform. On Thu, Jul 15, 2021 at 2:29 PM Naraina Damle <cadvis...@gmail.com> wrote: > GOOD > > On Tuesday, July 13, 2021 at 8:41:14 AM UTC+5:30 nikh...@gmail.com wrote: > >> Hi All, >> >> Sharing about a recent collaboration I did with Rajesvari Parasa to turn >> a development plan PDF into an web based interactive map. Spinoffs from >> here may be useful to the data community. >> >> Here's the output: >> https://draftmpd41.github.io/ >> >> >> >> >> Sharing what went into it: >> >> 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 >> <https://duckduckgo.com/?t=lm&q=ogr2ogr&ia=web>" 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 >> >> >> 2. Poor person's GIS system >> - I cobbled together a static website (html + vanilla javascript) that >> mimics those geoserver-driven multiple-layers-groups sites like we see at >> Bhuvan and various municipal corporations' GIS portals. >> - Code: https://github.com/draftmpd41/draftmpd41.github.io >> - Parameterised the whole thing: By editing a small JS file and CSV >> table, you can repurpose this to make it yours. >> - The site is static, as in: no backend. Can run it anywhere. >> - Loads layers only when user clicks on them first time. So, site loads >> quickly even if data is heavy. >> - Disclaimer: if you don't want your site visitors grabbing all the data, >> then please go the geoserver way. This one's for open sharing (F12 > >> Network > XHR) >> >> >> 3. Developed but not deployed: Citizens inputs layer >> - Here, I added in a citizens' inputs form to capture geo-located >> comments. The comments go to a backend program where they're saved in a >> basic MySQL DB. >> - We haven't activated this because there aren't any people on board to >> admin the thing (moderation, spam prevention etc - nightmare). >> - But the setup is simple and can be useful for others who want to do >> this, so sharing it. >> - Frontend with additional section and inputs layer: >> https://github.com/draftmpd41/frontend-with-inputs >> - Backend code: https://github.com/draftmpd41/draftmpd41_backend (in >> python3) >> - It's setup such that frontend and backend can be hosted separately. >> - Disclaimer. It's simple and basic. No user accounts or spam prevention. >> Moderation would have to be through phpMyAdmin on the backend server. >> >> -- >> Cheers, >> Nikhil VJ >> https://nikhilvj.co.in >> > -- > 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. > To view this discussion on the web visit > https://groups.google.com/d/msgid/datameet/c8e88b31-be2a-4f38-be51-f9ab91b07f6fn%40googlegroups.com > <https://groups.google.com/d/msgid/datameet/c8e88b31-be2a-4f38-be51-f9ab91b07f6fn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/datameet/CA%2BGKQr2EoJR0hHfOM934YfLpsYAuYsH7s9LbpdhkvE9aezG6cA%40mail.gmail.com.
