Single Mask File of All Towns that are Fully or Partially in the Ipswich Watershed - Idrisi Raster File.


This datalayer is part of a group of layers used for research in the Ipswich River Watershed. This datalayer is a mask of the area within the towns that make up the Ipswich River Watershed study area. The area on this mask is the complete town area of each town, and as such includes areas that are not actually within the watershed. This map has full information and was derived from the “ip30_noinfo_townmask” image. To be used to maske out area not within any town within the Ipswich River Watershed.

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Downloaded from MassGIS, imported into ArcView 3.2 as ArcView shapefiles. Edited to only towns within Ipswich River Watershed.
Exported to Idrisi32 Release 2. Removed areas that coincide with “noinfo” category through an overlay.

Process_Date: 200106


Information relevant to the GIS data encoding

Mask which encompasses all towns that have at least part of their area in the Ipswich watershed.Horizontal Coordinate System Name:NAD 1983 StatePlane Massachusetts Mainland FIPS 2001

Datum: D North American 1983
Reference Ellipsoid: Name: GRS 1980 Semi Axis: 6378137.0
Meridian: Greenwich
Projection Name : Lambert Conformal Conic
Number of bands : 1
Raster Origin : Lower Left
Rows : 1152
Columns : 1692
Cell Geometry :pixel


Progress: Complete. Maintenance and Update Frequency: None Planned. Edition: 1ed

Metadata converted from MSWord documentation on 1.15.2013 by M. Hayn using "PIE_WordMetaConvert" package developed for conversion of data to EML 2.1.0 in R environment.

8/1/2019 corrected lat/long inversion for Ipswich Watershed boundary box.



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