Hi Nikhil, Will try out some of the things you suggested & get back to you. Thanks !
On Saturday, February 1, 2020 at 4:27:45 PM UTC+8, Nikhil VJ wrote: > > Hi Saba, > > Sharing two approaches, one of which I've taken to replicate at my end > what mapbox does, without relying on them, to make this: > https://server.nikhilvj.co.in/watershed_overlap_map/overlap-watershed2.html > > 1. *QMetaTiles* plugin on QGIS > > Generate tiles from QGIS project > > Generates raster tiles from QGIS project for selected zoom levels and tile > naming conventions (Slippy Map or TMS). It can also package tiles for > variety of formats and applications, NextGIS Mobile, GeoPaparazzi, simple > Leaflet-based viewer and MBTiles. > > >> could be used to generate tiles from a large GeoTIF, host own tiles as > an alternative to mapbox > > > 2. Gdal2tiles program > > Command-line: https://github.com/commenthol/gdal2tiles-leaflet > > GUI tool : https://wiki.osgeo.org/wiki/MapSlicer > > > I think I'd done the latter and later on found out about the former as a > much simpler way. > > > In QMetaTiles plugin, check on the "write leaflet..." option and it should > also generate a webpage for you. Then you can just upload the webpage and > the folder onto a website and you have both a generic page and a custom > tile-layer URL path to give to others. > > > Extra Detail: > > What either of these do is : cut up that one big image into "slippy" map > tiles, the kind you see when you see on a web map. Thousands of 256x256 > pixel images at different zoom levels, which can then be loaded onto a > webmap as a custom background tiles source. Advantage is that a user can > easily browse around and only the required portions are loaded quickly, > rather than having to load up the entire tif. > > > Side note: The same tech can be used for tiling non-map large images too. > Working example: > https://server.nikhilvj.co.in/tilemaker/leaflet-painting.html#1/0/0 > > > -------- > > Data related > > I opened the link to humdata site you mentioned in your email and tried > downloading the data. Didn't work from browser at all - download would > reach 90-something percent and then die off. Then I went on my website > server and downloaded there and it worked, and it worked by command-line > "wget" on my ubuntu laptop. > > > Loading the .tif on QGIS, lookin good: > [image: AS44.png] > > ... but it's not the whole country. > All the maps from AS42 through AS47 can be seen here: > https://data.humdata.org/search?q=southasia&ext_search_source=main-nav > > > More links related: > https://data.humdata.org/organization/facebook > > https://ai.facebook.com/blog/mapping-the-world-to-help-aid-workers-with-weakly-semi-supervised-learning > > -- > Cheers, > Nikhil VJ > https://nikhilvj.co.in > > > On Fri, Jan 31, 2020 at 6:02 PM Saba Mundlay <smun...@gmail.com > <javascript:>> wrote: > >> >> Hi Friends, >> >> I've *really* been struggling to get these datasets >> <https://data.humdata.org/dataset/southasia_as434-high-resolution-population-density-maps> >> >> onto Mapbox. Would appreciate guidance / help. The issue seems to be that >> the dataset is a 64-bit tif, and mapbox maxes out at 8-bit tifs... >> I know that it CAN be done because of this blog >> <https://blog.mapbox.com/ebola-response-platform-fc092fdbead1>. >> >> -- >> 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 data...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/datameet/4a03621f-0f10-413a-b75a-c793e5e054f9%40googlegroups.com >> >> <https://groups.google.com/d/msgid/datameet/4a03621f-0f10-413a-b75a-c793e5e054f9%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/4279aec7-a721-4c62-93cc-4df461852167%40googlegroups.com.
