I have a geotiff that I have been working with in tilemill and I would like to select portions (buildings) in the map and create new layers as geojson objects. My issue is I don't know how to get the coordinates to create the objects!
http://chimera.labs.oreilly.com/books/1230000000345/ch12.html#_choropleth
this is a link to what I'm trying to do with states I just need the step where the coordinates are gotten because it doesn't seem to be in this document, they just give a shout to the guy who defined them. If anyone has done something similar to this, please give me a shout!
Update
I am not looking for the coordinates to the US, I have a fictional map that I am working from.
TileMill is a tool for visualizing data and creating map tiles - it isn't designed for creating or digitizing tasks. You'll want to export your map to Mapbox (or another MBTiles-supporting server), and use a tool like Mapbox's map editor or geojson.io to create GeoJSON overlays on top of it.
Related
I'm brand spanking new to PowerBI (using V2.1) and need to create a solution that uses a map of Jefferson County KY to show the number of non-English speaking students by zip code. The users want the entire zip code area to "evenly weighted" in heat map fashion similar to this sample map below of all counties in Kentucky. I've looked at what MapBox and ArcGIS offers and I don't see where either of them do anything like this. Plus it looks like MapBox might be a pay solution, which I can't use. Does anybody know of any map solutions that do?
Total newbi here. I have played with studio for a few h but can not get over the next hurdle.
I would like to draw wine growing areas on the map.
Managed to draw areas. Tick.
I would like to give these areas a unique name.
Managed to create labels.
But I don't understand how the text is associated with the area.
I then want to search for this label, so that the map zooms in on that area.
Just like when I search for "Coburg, Victoria, Australia".
I have managed to publish my maps including the areas in my WordPress website.
So my access token and my style does the right thing.
Need some hints how to get the labelling and searching happening.
Thank you for any help.
Regards
Romano
and welcome to using Mapbox.
I would like to give these areas a unique name. Managed to create labels. But I don't understand how the text is associated with the area.
Have you tried creating a Symbol layer, and setting the Text field to the appropriate field in your data source?
I then want to search for this label, so that the map zooms in on that area. Just like when I search for "Coburg, Victoria, Australia".
This goes beyond using Studio, and into building web maps with mapbox-gl-js. One starting point would be to use the Finder Impact Tool.
This might involve processing the data twice -- once for your base map, and another time in a spreadsheet to make available to the Finder template. It's possible to just do once, but would involve some modifying the Finder template.
https://labs.mapbox.com/education/impact-tools/finder-with-filters/
I am working on a project where Users can interact with a Map via mouse click to see more details of an area. It is Perth Metropolitan Area Map. This Map is generated from PDF using online "PDF to SVG converter".
When I looked at generated SVG code it is so huge can't understand full of it. and did some research to see if i can find any simpler version of the Map, I see there are various options to construct SVG, detailed below.
Shapefiles : Creating maps based on real world data, I thought this is good option to go. but the problem I observed here is we need to depend on GIS tools and open databases where GIS data is available. It is too heavy for our requirement.
Geo JSON / Topo JSON : I see this is simple way to represent Maps in plain, but I could not figure out a way to generate required JSON files. After exploring more on this I understood these technologies are dependent on GIS / Shapefiles.
Inscape : UI editor to draw SVG - It is just generating lot of SVG code again.
After reviewing above all I kind of thinking may be I should learn to write own SVG map.
Can somebody advice whether I am in right direction or Are there any simple approaches to create a Map like this Perth Metropolitan Area Map ?
Thanks in advance.
I want too build a web application, and I am looking at the tools I will have to use.
I want to use a real time map
I'm a thinking about :
Tilemill to get .png in order to constitue the background of my maps
or get data from a webite in shp files to build layers for this in mapnik.
Mapnik Build layers with the data I want to add on my map.
Mapnik : Put layers together and generate a map.
TileStache : generate tiles for my application.
Openlayers : Display my map with tiles in a browser.
Once my map is displayed, I'd like to add interactivity. For example when you go over a line or a circle (a town/ an event), then it gives you the attributes of this object.
But the lines and circles will integrated dirctly to the mapnik map, so I need to add some javascript to make it dynamic and open a pop-up. How do I do this ? Using Openlayer javascript libraries or node.js.
What is your advice on the question/the way I want to use theese tools?
Thanks a lot!
I'm in a similar situation, so I don't know the answer, but from what I've been able to figure out I think you're on the right track.
I started off using the Mapbox approach, which simplifies things as long as your data is static. You use Tilemill not only to generate your PNG tiles (once you've used Carto to do some nice styling) but also to import your data sets.
TileMill can export your TileJSON and UTFGrid files with the PNG tiles all packaged up and ready to use. Mapbox will then host all that stuff for you, and you can use their mapbox.js library (an extension of Leaflet) to bring it all together in the browser, with full interactivity. Opening popups would be something you'd do in Javascript in the browser - and if you mean infoWindows (the overlay window that's associated with a map point) then that would be a call to the Leaflet API.
If you're happy to create your layers and import your data offline this approach seems to be really simple and powerful; Mapbox will even render out tiles using multiple layers overlaid - so for example you can see your circles on top of a satellite image, merged into a single PNG.
The problem really comes in when your data needs to be live and you can't therefore prepare it all ahead of time in TileMill. I'm still trying to figure this all out but it does seem as though a combination of TileStache and Mapnik would be able to serve you up the TileJSON, GeoJSON and UTFGrid files you'd need as well as the tiles themselves, in the way you've outlined in the question.
You might also want PostGIS and GeoDjango or similar behind the scenes in order to hold and manage your live data, respectively.
As I said, I'm still trying to actually get my full stack working so I can't vouch for this 100% but if your data is gathered upfront then I'd definitely recommend the TileMill route for simplicity's sake.
I hope that's a help!
I`m quite new to openlayers and trying to use wfs-t to let users add geometries to a map (using geoserver and a postgis-db in the background). This works quite well however I would like the users to add/edit some metadata of the geometries as well.
Is there any more or less easy to understand example/tutorial out there?