Disturbance

Compilation of Land Use Data in 21 and 37 Category Classifications - Ipswich and Parker River Watersheds - 1971, 1985, 1991, and 1999 - Vector Shapefile

Abstract: 

The MassGIS Land Use datalayer has 37 land use classifications interpreted from 1:25,000 aerial photography. This layer contains data for 21 and 37 category classifications for the years of 1971, 1985, 1991, and 1999. Coverage is complete for all towns that fall partially or completely within the Ipswich River and/or Parker River watersheds. Data compiled for 1971, 1985, 1991, and 1999.

Core Areas: 

Data set ID: 

269

Keywords: 

Short name: 

GIS_p_arc_vector_01

Data sources: 

GIS_p_arc_vector_01

Methods: 

In ArcMap, the database file HISTORY was joined to the data base file for LANDUSE based on the RELATEID Field.

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.

In ArcMap, the features in TOWNSFROMLU were brought combined based on the TILE_NAME field, using DISSOLVE.

The dissolved land use layer, which now shows town boundaries, was imported into Idrisi Kiliminjaro as a vector file. The .vdc file was edited to assign the names of each town to the proper polygon.

Process_Date: July 2006

Information relevant to the GIS data encoding

This layer shows land use for the Ipswich Study area, 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

Maintenance: 

Progress: Complete. Maintenance and Update Frequency: As needed. Edition: 1st

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.

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