Ipswich River Watershed

Nutrient Sample Sites - Ipswich Watershed - 1999 through 2002 - Idrisi Raster File.


This datalayer is part of a group of layers used for research in the Ipswich River Watershed. This layer contains the single pixel locations of each water nutrient sampling site within the
Ipswich River Watershed. This layer is the basis for further analysis of possible influences on nutrient sample site data.

Core Areas: 

Data set ID: 



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To extract data from other raster files in Idrisi for locations where chemical samples were taken.

Data sources: 



Created ESRI format (ArcView3.2) point shape file from X,Y coordinates. Imported the shape file into Idrisi and converted to
Grid structure to match parameters from Ipswich 30m Study Area Window. NOTE: February 2002, Location of Sample site number 70
was adjusted one column (one 30-meter cell) to the west (from original location: row 299, column 1355, to new location: row 299,
column 1354), in order that the site would be located within the Info_Town Mask window.

Process_Date: 20011215


Information relevant to the GIS data encoding

Locations of chemical samples

Horizontal Coordinate System Name:NAD 1983 StatePlane Massachusetts Mainland FIPS 2001Datum: 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: First

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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