topic Re: Points along line - line length wrong in ArcGIS Pro Questions

Points along line - line length wrong

eotwmapping — Wed, 18 Jan 2023 00:43:06 GMT

I have a line feature with an attribute length of 511421.542756 US Survey Feet. I used calculate geometry to get this value.

When I use the "Create Points Along Line" function under editing it states the length of the line is 1.537.

Any idea why it is so far off?

Thanks

Re: Points along line - line length wrong

DanPatterson — Wed, 18 Jan 2023 02:13:52 GMT

one file is in a projected coordinate system and the other is in geographic.

Check the coordinate systems of the inputs and the tools you are using.

Re: Points along line - line length wrong

eotwmapping — Wed, 18 Jan 2023 16:05:53 GMT

Thank you for the reply, Dan.

I checked this morning and believe I have everything in WGS 1984 (auxiliary sphere) projection, but the same issue is happening. I have attached a screenshot. Any help would be greatly appreciated.

Re: Points along line - line length wrong

DanPatterson — Wed, 18 Jan 2023 19:13:41 GMT

right-click on each layer and select Properties, check the coordinate system there

Do the same for the map itself, since it may be in a different coordinate system

Re: Points along line - line length wrong

eotwmapping — Wed, 18 Jan 2023 20:26:52 GMT

Thanks for the reply, Dan.

I'm not sure what is going on, but as far as I can tell my layers and map are all the same coordinate system. I have changed them both to the same, changed to others to try, and can't get it to work. I don't have a good work around for this so don't quite know what I am going to do to resolve this issue.

😖

Re: Points along line - line length wrong

eotwmapping — Wed, 18 Jan 2023 20:44:57 GMT

@DanPattersonI have 8 individuals polylines that I am wanting to be a single line and then divide into mile segments. I traced all 8 lines to make a single polyline and that is what is not allowing me to split or divide.

When I go back and try and select the 8 individuals lines all but 2 segments are able to be selected. One (the southern section) is part of a larger line and this is only one row of the attribute table. The other towards the center is a full section.

I am lost right now, so wanted to provide this context and see if that helped understand what my problem is. Screenshot attached of what I am seeing.

Re: Points along line - line length wrong

Scott_Harris — Wed, 18 Jan 2023 21:01:06 GMT

@eotwmapping based on your screenshot of the Map Properties > Coordinate Systems page, it seems that some of your layers are using a Geographic Coordinate System (GCS). We have a known issue for the Create Points Along Line tool when the map uses a GSC that we intend to address in a future release of the software.

My recommendation is to get all the layers in the same Projected Coordinate System, as well as the map, and then do your editing. More information on the topic of "projection on the fly" can be found here https://pro.arcgis.com/en/pro-app/latest/help/editing/introduction-to-projection-on-the-fly.htm

If you need help, please consider contacting Esri Technical Support: https://support.esri.com/en/contact-tech-support

-Scott