Minnesota Department of Transportation

511 Travel Info

Cultural Resources


historical artifact

Mapping Area of Potential Effect (Archaeology or History)

The project APEs for archaeological and historical resources must be provided as separate polygon shapefiles.  For the archaeology APE, the shapefile will be named apea.shp.  For the history APE, the shapefile will be named apeh.shp.  The file attributes will be the same. The polygon boundary must be closed. APEA is a required layer if an archaeological survey is conducted.  APEH is a required layer if an architecture/history survey is conducted.  Do not map an APE for an area where there will be no potential effect.  For example, if a portion of the project consists of only a tar overlay, do not map an APE for that portion, as there is no potential effect for archaeological or historical resources.



Attribute Table Definitions for APEA and APEH Shapefiles

Field Name Type Length Precision Scale Values


Text 40 0 0

Project Number, e.g.

SP 73-602-17

SAP 14-599-33

CP 193-34-206

If there is no project number, enter a descriptive term to identify the project.

HWY_TYPE Text 4 0 0

Highway type. The only valid values are:

CSAH - County State Aid Highway

CR - County Road

TH - Trunk Highway

TL - Trail

TR - Township Road

OTH - Other (including non-road projects)

HWY_N Text 4 0 0 Highway number or road code, e.g. 66, 169, 35W, C (if county road), etc.
CONTRACTOR Text 30 0 0 Name of contractor performing survey (ALL CAPS)
MAP_METH Text 1 0 0

Mapping method:

1 - Digitize from paper

2 - Generate from GPS

3 - Heads up digitizing

4 - Buffer centerline

5 - Imported from CAD or GIS data




4 4 0 Year of survey
PHASE Text 10 0 0 Phase of work ("I", "II", or "III"). If more than one phase, separate by a comma, but no space (e.g. "I,II").