Digitized data of historic river mile markers from USGS topo maps?

635
2
03-02-2017 03:23 PM
IngridMans1
New Contributor

I haven't been able to find any actual digital points for the historic river mile markers that you would find on a topographic map.  

0 Kudos
2 Replies
DanPatterson_Retired
MVP Emeritus

What type of source are you looking for and where?  maybe check https://community.esri.com/community/gis/web-gis/arcgis-open-data?sr=search&searchId=16c12814-c5fc-4...‌ to see if any is there

0 Kudos
IngridMans1
New Contributor

Primarily a federal source....doesn't appear to be any of the sort on Data.gov and I've never seen any such points included in NHD datasets of NHDPlus.  For some of our mussel surveys, historic recordings reference these mile markers so rather than eyeballing the DRG's for them it would be great if this data existed in digital form.

0 Kudos