Matthew Bloch

@kevinahuber, it looks like you pulled in the U.S. Virgin Islands along with P.R... was that on purpose?

Hi! I would like to add the ability to export metadata about data layers. I imagine that most users would want JSON-formatted output. The main stumbling block for me is...

It looks like you are trying to use mapshaper in your own web application, is that right? In addition to `mapshaper.js`, you would also need to load `modules.js` (see https://mapshaper.org/modules.js)....

Sorry I didn't reply sooner! I'm only supporting mapshaper as an end-user program, I don't have time to help developers with their projects.

I added some support for cleaning linestrings to mapshaper in v0.4.146. In particular, self-intersections are removed by splitting paths at the point of intersection. I tested using `ne_10m_rivers_lake_centerlines.shp` (attached below)...

I reproduced this... the "Add a file" button only seems to work once. I'll look into why this is happening. Meanwhile, you can add more files by dragging them onto...

The coordinate system of your original file uses the NAD27 datum, which was developed in 1927 using traditional surveying techniques. Mapshaper doesn't support converting these coordinates to a modern coordinate...

You're right, there is no way to reference attribute data for the target layer in a `calc` expression. You would have to add an `-each` command after the join, like...

Thanks for filing this issue! Mapshaper's -polygons command does not currently close open paths, except for very small "undershoots" (with the gap-tolerance= option). I would be happy to add the...

v0.5.118 prevents the DBF text encoding message that sometimes appeared while running -clip and -erase. About `.cpg` files: Mapshaper will use a `.cpg` file if it is present, but Mapshaper...