Matthew Bloch

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I think I see what's happening. A spike along the boundary of a polygon can have one of two forms: an overlap or a cut-in shape. If you zoom in...

I'd like to add the ability to remove sliver-shaped cuts, but that will require a bit of R&D work.

1. Your file contains unprojected geographic coordinates (degrees of latitude and longitude). The CRS should be an unprojected geographic coordinate system like WGS84, not the equirectangular projection, which would use...

I'd like to address both issues you raised 1. Allowing more commands to run on two or more layers from different datasets. 2. Making display of the ghosted lines optional....

The ghosted lines are now an option in the new "Display" menu.

You're talking about a background tiled layer, right? I've thought about adding support for custom base layers. Do you know if the TMS layer you want to use is compatible...

Looking at the URL, it probably will work. I'll put this near the top of my todo list, hope to get support added within a few days.

Meanwhile, this tool already supports custom tile layers and drawing. You might see if it meets your needs: https://play.placemark.io/ Here's a screenshot of the menu path to add custom layers

Hi, I just updated Mapshaper with a first-pass version of custom layers. The xyz URL template you gave above seems to work.