Commentary on the research problems, materials and dates that were remarkable or unusual in the process of historical compilation (Not every state requires a commentary). Also accessible from the Supplemental Texts link at the bottom of the interactive map frame.
Single-page document providing information about the shapefile data used for the interactive map site and available for download. Based on the US Historical Counties shapefile including Alaska and Hawaii. Includes: Project Description, Preferred Style for Citation, and Spatial Reference Information.
Single-page document providing information about the shapefile data used for the interactive map site and available for download. Based on the US Historical State and Territory shapefile including Alaska and Hawaii. Includes: Project Description, Preferred Style for Citation, and Spatial Reference Information.
Document providing complete information about the shapefile data used for the interactive map site and available for download. Based on the US Historical Counties shapefile including Alaska and Hawaii. Includes: Identification and Citation Information (abstract of the project coverage, purpose, contents, and method of historical compilation), Data Quality Information (attribute and positional accuracy, historical and digital sources, step-by-step process descriptions), Spatial Data Organization Information, Spatial Reference Information, Entity and Attribute Information, Distribution and Metadata Reference Information. Also accessible from the Download Shapefiles page.
Document providing complete information about the shapefile data used for the interactive map site and available for download. Based on the US Historical State and Territory shapefile including Alaska and Hawaii. Includes: Identification and Citation Information (abstract of the project coverage, purpose, contents, and method of historical compilation), Data Quality Information (attribute and positional accuracy, historical and digital sources, step-by-step process descriptions), Spatial Data Organization Information, Spatial Reference Information, Entity and Attribute Information, Distribution and Metadata Reference Information. Also accessible from the Download Shapefiles page.
Full contents of the Atlas of Historical County Boundaries may be downloaded free of charge for use under the stipulations and constraints described in the Creative Commons License. Downloads a zipped folder containing the national dataset. Contents include:
| Files | GIS Files +AK/HI |
|---|---|
| Full file not generalized | 503 MB |
| Generalized .0001 degree tolerance | 224 MB |
| Generalized .001 degree tolerance | 52 MB |
| Generalized .01 degree tolerance | 9 MB |
| Generalized .05 degree tolerance | 4 MB |
| Files | GIS Files +AK/HI |
|---|---|
| Full file Not generalized | 110 MB |
| Generalized .0001 degree tolerance | 53 MB |
| Generalized .001 degree tolerance | 14 MB |
| Generalized .01 degree tolerance | 2 MB |
| Generalized .05 degree tolerance | .6 MB |
Downloads a zipped folder containing Atlas data formatted to be used with Google Earth and Google Maps.
| Files | KMZ Files -AK/HI |
KMZ Files +AK/HI |
|---|---|---|
| Full file Not generalized | N/A | N/A |
| Generalized .0001 deg. tolerance | N/A | N/A |
| Generalized .001 deg. tolerance | 33 MB | 46 MB |
| Generalized .01 deg. tolerance | 7 MB | 10 MB |
| Generalized .05 deg. tolerance | 5 MB | 5 MB |
| Files | KMZ Files -AK/HI |
KMZ Files +AK/HI |
|---|---|---|
| Full file Not generalized | N/A | N/A |
| Generalized .0001 deg. tolerance | N/A | N/A |
| Generalized .001 deg. tolerance | 7 MB | 10 MB |
| Generalized .01 deg. tolerance | 1 MB | 2 MB |
| Generalized .05 deg. tolerance | .5 MB | 1 MB |
