Mapping historic properties
Historians should map all surveyed properties. Surveyed properties may be any features, historic or modern, recorded in a historic/architectural survey. These may include structures, railroads, farmsteads, etc.
Boundaries of surveyed properties (historic and modern) 10 acres or larger (i.e. historic districts) must be digitized as polygons in a separate layer. The shapefile must be named featpl.shp. The exception would be linear features, such as road networks, that cover more than 10 acres. Because these features are linear, they should be digitized as lines in the shapefile featli.shp. Digitize only line segments that have been surveyed and are within your APE. It is not your responsibility, for example, to map an entire railroad corridor.
Features smaller than 10 acres may be digitized as polygons, lines or points, at the discretion of the Consultant. Features represented as points should be in a shapefile named featpt.shp. Points representing structures must be centered on the structure itself, not at the street end of the sidewalk or some other location.
If data are collected using GPS, they should be corrected in the GIS by overlaying the GPS points on a digital orthophoto, at a scale of 1:24,000 or better, and centering each GPS feature over the correct orthophoto feature or feature part. Thus, any digitized rail lines submitted to MnDOT’s CRU should accurately overlay the corresponding rail line on the FSA orthophoto when zoomed to a scale of 1:24,000, as should each point representing a structure or polygon representing a farmstead.
Attribute Table Definitions for FEATPL, FEATLI, and FEATPT Shapefiles
Field Name | Type | Length | Precision | Scale | Values |
---|---|---|---|---|---|
PROJ_N |
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. |
INVENTNUM | Text | 12 | 0 | 0 | Historic Inventory Number, e.g. AK-AIC-022. If feature is a modern property, use "MODERN" + the feature's field number. For example "MODERN FN-1" would be a valid entry. |
ACRES | Number (Double) |
64 | 10 | 1 | Estimated site area, in acres. Fractions (in 1/10ths of an acre) are allowed. |
WIDTH | Number (Float) |
64 | 6 | 1 | This field should be coded as 0 for polygon features, since there should be no additional feature “width” beyond the polygon’s boundaries. |
CONTRACTOR | Text | 30 | 0 | 0 | Name of contractor performing survey (ALL CAPS) |
MAP_METH | Text | 1 | 0 | 0 | Mapping method
4 – Buffered centerline or point 5 - Imported from CAD or GIS data |
YEAR | Number (Short) |
4 | 0 | 0 | Year of survey |
DATE_CON | Text | 9 | 0 | 0 | Date of Construction, as known year (e.g., 1874), estimated year (e.g., c1874), or a date range (e.g., 1874-1879). |
TYPE | Number (Short) |
1 | 0 | 0 | Category of Historic Property as defined by the National Register Bulletin: How to Apply the National Register Criteria for Evaluation.
|
SUBTYPE | Text | 30 | 0 | 0 | Feature subtype (ALL CAPS) from the National Register Bulletin: How to Apply the National Register Criteria for Evaluation. This Bulletin defines subtypes (examples) for each category (Type) listed above.
-The subtype FARMSTEAD should always be
-The subtype TCP (traditional cultural property) should always be coded as 4 (Site) in the TYPE field. |
PERIODCON | Number (Short) |
3 | 0 | 0 | Post Contact Period Context as defined by the Guidelines for SHPO Architecture/History Projects (1993, p. 14), or newly defined context as approved by MnDOT's Cultural Resources Unit.
Regions 1870-1945
If a newly defined period context, contact culturalresources.dot@state.mn.us with the definition for assignment of a number prior to submitting data. |
THEMECON | Text | 3 | 0 | 0 | Thematic Context as defined by the Guidelines for SHPO Architecture/History Projects (1993, p. 15), or newly defined context as approved by MnDOT's Cultural Resources Unit.
If a newly defined thematic context, contact culturalresources.dot@state.mn.us with the definition for assignment of a number prior to submitting data. |
TYPEDOC | Text | 3 | 0 | 0 | Numeric code for the Property Type Documentation as defined by the Guidelines for SHPO Architecture/History Projects (1993, p. 15), or newly defined documentation as approved by MnDOT's Cultural Resources Unit.
If a newly defined property type documentation, contact culturalresources.dot@state.mn.us with the definition for assignment of a number prior to submitting data. |
CRITERIA | Text | 7 | 0 | 0 | Criteria for Evaluation from the National Register Bulletin: How to Apply the National Register Criteria for Evaluation. If more than one criterion, use commas as separators, and do not include blank spaces (i.e. A,B,C).
A - Associated with events that have made a significant contribution to the broad patterns of our history in our past period, or method of construction, or that represent the work of a master, or that possess high artistic values, or that represent a significant and distinguishable entity whose components may lack individual distinction information important in prehistory or history |
CONSIDER | Text | 1 | 0 | 0 | Criteria Considerations from the National Register Bulletin: How to Apply the National Register
from architectural or artistic distinction or historical importance location but which is significant primarily for architectural value, or which is the surviving structure most importantly associated with a historic person or event outstanding importance if there is no appropriate site or building directly associated with his or her productive life from graves of persons of transcendent importance, from age, from distinctive design features, or from association with historic events executed in a suitable environment and presented in a dignified manner as part of a restoration master plan, and when no other building or structure with the same association has survived design, age, tradition, or symbolic value has invested it with its own exceptional significance 50 years if it is of exceptional importance |
AREASIG | Text | 15 | 0 | 0 | Area(s) of Significance from the National Register Bulletin: How to Apply the National Register Criteria for Evaluation. If more than one area of significance, separate numbers with commas. 1 - Agriculture 2 - Architecture 3 - Art 4 - Commerce 5 - Communications 6 - Community Planning and Development 7 - Conservation 8 - Economics 9 - Education 10 - Engineering 11 - Entertainment/Recreation 12 - Ethnic Heritage - Asian 13 - Ethnic Heritage - Black 14 - Ethnic Heritage - European 15 - Ethnic Heritage - Hispanic 16 - Ethnic Heritage - Native American 17 - Ethnic Heritage - Pacific Islander 18 - Ethnic Heritage - Other 19 - Exploration/Settlement 20 - Health/Medicine 21 - Industry 22 - Invention 23 - Landscape Architecture 24 - Law 25 - Literature 26 - Maritime History 27 - Military 28 - Performing Arts 29 - Philosophy 30 - Politics/Government 31 - Religion 32 - Science 33 - Social History 34 - Transportation 35 – Other |
PERIOD | Text | 9 | 0 | 0 | Period(s) of Significance. Date (e.g., 1874) or date range (e.g., 1874-1935). |
ELIGIBLE | Text | 2 | 0 | 0 | Eligibility:
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