Hi Ronda,
I am sure others will help and respond to your questions here. However, it would take more time to describe using GNIS and its results by typing up a detailed reply than it would to set up a Zoom meeting and a "show and tell", which I am willing to do if you would like.
Also, and I don't think this is a requirement, but because things like search interfaces in geoportals use bounding box coordinates it is a "best practice" to give coordinates in both GNIS form (x,y point coordinates) and in bounding box form (via Klokan Bounding Box tool), I always include both when creating new authority records for geographic names.
Send me a message at [log in to unmask] if you are interested in me walking you through the GNIS search process and sorting out the results that you get and I will work with you on this.
Paige
________________________________
From: Maps-L: Map Librarians, etc. <[log in to unmask]> on behalf of Sewald, Ronda <[log in to unmask]>
Sent: Tuesday, July 14, 2020 4:26 PM
To: [log in to unmask] <[log in to unmask]>
Subject: Interpreting GNIS coordinates for 034 in NACO geographic headings
Hi Everyone,
I've started creating geographic name authority records and I am curious as to how others are handling coordinates in the 034 field for larger jurisdictions such as townships.
DCM Z1 recommends entering bounding box coordinates as opposed to points for larger jurisdictions, and most of the training materials I'm seeing recommend obtaining these values through GNIS. Unfortunately, I can't quite sort out what coordinates GNIS is actually providing for larger jurisdictions or how to translate these into an 034. For instance, if I look at the entry for Harrison County (Ind.) there are seventeen sets of coordinates:
https://geonames.usgs.gov/apex/f?p=138:3:::NO:3:P3_FID,P3_TITLE:451677,Harrison%20County<https://nam01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgeonames.usgs.gov%2Fapex%2Ff%3Fp%3D138%3A3%3A%3A%3ANO%3A3%3AP3_FID%2CP3_TITLE%3A451677%2CHarrison%2520County&data=02%7C01%7Cpga2%40PSU.EDU%7C37e5bbc58a244d65039208d8283ce7d3%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637303589345166993&sdata=K%2BWCdDmPkhK0ihsdMhUY37K5syXpKgsv9ptn2Rq7Gwc%3D&reserved=0>
I thought that perhaps these coordinates were outlining a polygon of the county boundaries, but it looks like:
1) the furthest outlying values don't correspond with the bounding box generated by Klokantech for Harrison County;
2) some of the coordinates fall within the county as opposed to along the boundaries;
3) for the heading I'm attempting to establish, Boone Township in Harrison County, there are three sets of coordinates, which seems a bit off for creating a four-sided polygon.
In cases like these, should I be using GNIS as the source of the coordinates for the 034 in a geographic name heading. If so, how? If not, what sources are people commonly using and are they trying to capture a bounding box as opposed to point coordinates?
Thanks!
Ronda L. Sewald
-----------------------------------------------------------
Cartographic Resources Cataloger
Indiana University Libraries
Technical Services
Wells Library, Rm. 350
1320 E. 10th St.
Bloomington, IN 47405
Ph. 812-855-2059
[log in to unmask]<https://nam01.safelinks.protection.outlook.com/?url=https:%2F%2Fwww.exchange.iu.edu%2Fowa%2Fredir.aspx%3FC%3D1SfV6DRrrkeCv5OiBjAv_gaPTmaV8dEIZB4vG4ItNp6Uc8vy6wuhRzbOtcAdInI94CJ7WbuxjAM.%26URL%3Dhttp:%252f%252fwww.indiana.edu%252f~bfca&data=02%7C01%7Cpga2%40PSU.EDU%7C37e5bbc58a244d65039208d8283ce7d3%7C7cf48d453ddb4389a9c1c115526eb52e%7C0%7C0%7C637303589345176980&sdata=v0D6QCuLRiy6nPhjKHx10RSfR9STR3%2BlpxgHGeITJNg%3D&reserved=0>
|
