Land Use, 21 Categories - Ipswich and Parker River Watersheds - 1991 - Idrisi Raster File.

Summary

Short name: 

GIS_p_landuse21_1991_01

Abstract: 

This datalayer is part of a group of layers used for research in the Ipswich River Watershed. This layer was created in July 2006 for the Marine Biological Laboratory (MBL) in Woods Hole, MA. This layer shows the land use, 21 categories, for the towns in the Ipswich River Watershed and the Parker River Watershed for 1991. This datalayer has complete information.

Citation Suggestion: 

Connors, J., , Pontius, R. G. 2019. Land Use, 21 Categories - Ipswich and Parker River Watersheds - 1991 - Idrisi Raster File. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/435d444e3c6bca065340fd8b8439dad9

Data set ID: 

276

EML revision ID: 

2

Data sources: 

GIS Data Archive Download: GIS_p_landuse21_1991_01.zip

This layer shows land use for the Ipswich Study area, which includes the Parker River, Ipswich River, and Rowley River watersheds, based upon MassGIS classification and grouped in accordance with the Anderson: Level I convention.

Categories

PIE Research Areas: 

Keywords: 

GIS Section: 

Section: 

Core Areas: 

Dates

Date Range: 

Tuesday, January 1, 1991 to Tuesday, December 31, 1991

Publication Date: 

Thursday, August 1, 2019
People

Owner/Creator: 

Robert G. Pontius Jr.
Related
Downloads
Methodology

Methods: 

In ArcMap, towns within our study area were selected from LANDUSE and a new layer was created from this selection. Towns were selected by attribute, based on their Town_ID code. The following Town_IDs were
selected: 9, 30, 31, 38, 48, 71, 92, 105, 116, 119, 144, 164, 184, 205, 206, 210, 213, 229, 246, 254, 295, 320, 298, 324, 342, and 347. The selected features were then exported as a new layer, TOWNSFROMLU.

The land use map of the study area was imported into Idrisi Kiliminjaro and converted to a raster file. After importing TOWNSFROMLU, the data base file was opened and the field LU21_1991 was exported to a raster image.

The map was updated to give a value of 3 to pixels in the following positions: (r: 344. c: 1017) and (r: 769, c: 1179). This value was assigned because these pixels were not classified in the conversion from vector to raster. They were assigned membership to the foreset class based on visual analysis of the original vector data.

Process_Date: July 2006

Information relevant to the GIS data encoding

This layer shows land use for the Ipswich Study area, which includes the Parker River, Ipswich River, and Rowley River watersheds,
based upon MassGIS classification and grouped in accordance with the Anderson: Level I convention.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 : 1476
Columns : 1692
Cell Geometry :pixel