Plum Island Ecosystems LTER Database

http://ecosystems.mbl.edu/PIE

Acceptance and utilization of PIE-LTER data requires that:

· The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.

· The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.

· A copy of any resultant publications should be sent to:

(Principal Investigator)
Ecosystems Center;
Marine Biological Laboratory
Woods Hole, MA 02543

PLUM ISLAND ECOSYSTEMS LTER DATABASE

DATA FILE: GIS-IP-ip30_info_slope.RDC

GIS-IP-ip30_info_slope.rst

DOCUMENTATION FILE: GIS-IP-ip30_info_slope.doc

YEAR: 2002.

PI: Gil Pontius

OTHERS: JD Head

BRIEF DESCRIPTION OF DATA FILE:

This datalayer is part of a group of layers used for research in the Ipswich River Watershed. This is slope data for the study area. Taken from the source elevation tile data which was provided on the MassGIS website www.state.ma.us/mgis/massgis.htm in ESRI-format shapefile format and imported into IDRISI software using the ShapeIdr command. The resulting vector elevation files were converted to raster format using successive Lineras macro commands. This has the effect of mosaicing the tiles as well. The raster image was filtered once using a low-pass (mean) filter, then masked to the Ipswich study area parameters (extent). We then used the DEM to produce the slope model using the SURFACE module in IDRISI.

KEYWORDS: PIE LTER, GIS, Ipswich River watershed, Parker River watershed, land, historical

SITE TYPE:

RESEARCH LOCATION: Parker and Ipswich River watershed

EXPERIMENTAL DESIGN AND METHODS:

NOTES AND COMMENTS:

VARIABLE DESCRIPTION:

CALCULATIONS:

FOR MORE INFORMATION, CONTACT: Gil Pontius

OTHER DATA FILES TO REFERENCE:

REFERENCE CITATIONS:

DATA AVAILABILITY STATUS: Type I

ARCHIVE INFORMATION:

Date of entry: October 4, 2007

Data entered by: John Connors

Comments: