Boundaries of the designated study area - Ipswich and Parker River Watersheds - Idrisi Vector File.


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 Marine Biological Laboratory (MBL) in Woods Hole. This layer shows the boundaries of the PIE study area. This datalayer has complete information. Display boundaries for the study area.

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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.

Process_Date: 200607

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 TILE_NAME was exported to a raster image.

Process_Date: 200607

The map was reclassified so that the towns were assigned a value of 1 and the background was assigned a value of 0.

Process_Date: 200607

The map was updated to give a value of 1 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.

Process_Date: 200609

The map was converted to a vector polygon image using the RasterVector module in Idrisi. Background values were excluded.

Process_Date: 200609


Information relevant to the GIS data encoding

This layer provides a vector mask for the total Plum Island Ecosystem study areaHorizontal 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


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.

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



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