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Questions tagged [mapshaper]

Mapshaper is an open source tool and online resource for simplifying maps and boundaries and working with geojson, topojson and other formats.

16 questions
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How to fix geojson to satisfy the needs of a mongodb 2dsphere index

I have ~400K documents in a mongo collection, all with geometry of type:Polygon. It is not possible to add a 2dsphere index to the data as it currently stands because the geometry apparently has self-intersections. In the past we had a hacky…
dan-man
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Problems converting shapefile to topojson with features

I downloaded a shape file from the U.S. Census and passed it through http://mapshaper.org/, which gave me a working topojson file to use in D3. However, I realized the topojson file had all the features labels stripped. So there is no way identify…
mikey8989
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QGIS generated shapefile malformed when converted to topojson by mapshaper

So I started with a really small example that is working well. I used QGIS to draw a line and then converted it to topojson with mapshaper. Then I use D3.js to load and visualize it. This is the bigger but not working example:…
kwoxer
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D3.js display Topojson

I've been having a problem drawing Venezuela using topojson. I got the GeoJson data for Venezuela from: http://code.highcharts.com/mapdata/countries/ve/ve-all.geo.json After, I tried to approaches using the topojson console utility and importing it…
Ricardo Macario
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d3 toposjon map troubleshooting … why does it look like all zig zags and shards?

UPDATE: solved, kind of. I spent some time learning ogr2ogr and topojson and made a topojson that works beautifully in D3. I'm not sure why the file spit out by mapshaper.org turned into shards in my hands; on their site, the file displays fine. …
Maggie
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How can I provide a variable percentage to mapshaper via the cli?

I need to simplify Admin 0 – Details > map units 10m NaturalEarthData ( file ). It is 25mb and I would like to get it down to around 1mb or less. This should be easy because the 110m near-equivalent data is ~1mb (it is missing features I…
Eric G
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ms_simplify from rmapshaper creates corrupted geojson file

I am trying to use rmapshaper ms_simplify function, using the system version as I am working with a large shapefile. The first steps of the simplification seem to work well but then I get an error that a temporary file created by ms_simplify is…
Victor Cazalis
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Is there a way to simplify shapefiles such that smaller polygons have more detail, and larger polygons have less detail?

I have a shapefile representing territories, some large and some small, that I would like to reduce in size. If I simplify the shapefile a lot, the larger territories are still easily recognisable, but the small ones lose a lot of detail and become…
michael
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Interactive farm maps

In my use case I need to create interactive farm maps where I can select fields. I'm trying to do this using the react-simple-maps component. what was done I created the farm Shapfile map in QGIS. Converted to TopoJSON using Mapshaper as per this…
Cleiton Freitas
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Using a Power BI Custom Shape Map

I have been trying to use a custom shape map in Power BI and I can not get it to work. The idea behind all this is to start from a .shp file, .dbf file and a .prj file and export it to a TopoJson file that actually works in Power BI in order to show…
PBI-experimenter
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Zoomed out d3 map from mapshaper.org

Can someone pls tell me what i'm doing wrong. I exported a topojson from mapshaper.org. Then I drew the map using the d3. But the map appears zoomed out(very small). How do I get it to be properly scaled and centered. Pls note that i've used some…
Jobie J
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running a global node application from Web API application using process

I have a WEB API application, done in ASP.NET framework 4.7, where I want to call an application in NodeJs using the command line, therefore, using the System.Diagnostic.Process. The NodeJs application has been installed using npm install -g…
Giox
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Is there a way to show grib2 or netcdf data on shapefiles using web interface?

I want to show some weather data on a given shapefile. I was checking if it's possible using mapshaper or web mercator but didn't find a suitable procedure. Any help is highly appreciated.
SB1990
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is there any chance to change projection for geojson(mapshaper)

Hello all, i am using OpenLayers 5, Angular 6, mapshaper tool(converting shp to json). MapshaperTool, Git Code my process i have installed npm mapshaper --save i am able to upload different .shp files and able to get json features data. i have 2…
kks
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How does mapshaper work to show a shapefile?

I just want to show my shp / json file as in http://mapshaper.org/ . How can I carry it out? I want to use similar platform to display my shapefile in web.
Sharma Aashish
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