MassGIS Data: Latitude/Longitude Graticules

July 2005
These two layers represent the graticule of latitude and longitude linework covering Massachusetts

Download these layers (ESRI Shapefiles):  - 1-minute graticule  - 10-minute graticule

Two layers are available that represent the graticule of latitude and longitude linework covering Massachusetts:

• MINLL1_ARC - 1-minute latitude-longitude lines
• MINLL10_ARC - 10-minute latitude-longitude lines

These two layers are meant to be used for general planning, cartographic display and educational purposes.

Production

MassGIS used Arc/Info Workstation to GENERATE lines in NAD83 Decimal-Degrees coordinates using the FISHNET option, which were then projected to the Mass. State Plane NAD83 Meters Mainland coordinate system.

Attributes

The MINLL10_ARC attribute table contains these items:

LATITUDE	Latitude value of the line ("NA" if line is longitudinal)
LONGITUDE	Longitude value of the line ("NA" if line is latitudinal)
LINE_0	Indicates whether the line is a 00 seconds line (i.e. 44 00 00)

The MINLL1_ARC attribute table does not contain any items other than those standard in an arc attribute table.

Maintenance

MassGIS is maintaining these layers.

In July 2005 these layers were re-created based on the production method described above. The previous versions were created based on NAD27 coordinates and were projected to NAD83, resulting in a slight shift from the features' true locations.

Last Updated 9/30/2008