Metadata: Lake Bathymetric Outlines, Contours, Vegetation, and DEM

Lake Bathymetric Outlines, Contours, Vegetation, and DEM

This page last updated: 04/24/2015
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
  1. Overview
  2. Data Quality
  3. Data Organization
  4. Coordinate System
  5. Attributes
  6. Distribution - Get Data
  7. Metadata Reference

Section 1: Overview

Originator:Minnesota Department of Natural Resources (DNR)

Title: Lake Bathymetric Outlines, Contours, Vegetation, and DEM

Abstract: This file geodatabase includes the following individual layers:

Lake Bathymetric Contours: Contours lines corresponding to lake bathymetry, digitized from existing lake contour maps produced by the DNR Ecological Services Lake Mapping Unit. Use in combination with other Lake Bathymetric GIS products. Classify and label contour lines with depth values. Convert to polygons and calculate lake surface area for each depth interval. Overlay onto bathymetric DEM shaded relief image.

Lake Bathymetric Digital Elevation Model (DEM): A digital elevation model (DEM) representing lake bathymetry. Cell size is most often 5m, although 10m cells were used for some lakes to reduce grid file size. This grid contains one attribute DEPTH that represents lake depth in (negative) feet. Use in combination with other Lake Bathymetric GIS products. Reclassify DEM based on various depth intervals. Calculate zonal and neighborhood statistics. Derive slope surface. Model depth data with other cell-based parameters (e.g., slope, vegetation, substrate, chemistry) to predict habitat suitability, functional niches, etc. (Note: These raster analyses require Spatial Analyst or Arc Grid.)

Lake Bathymetric Outline: Lake outline as digitized from 1991-92 aerial photography (1m DOQ's). Use in combination with other Lake Bathymetric GIS products. Overlay onto bathymetric contour lines and bathymetric DEM shaded relief image.

Lake Bathymetric Aquatic Vegetation: Aquatic vegetation represented as polygon features, coded with vegetation type (emergent, submergent, etc.) and field survey date. Polygons were digitized from scanned, geo-referenced Lake Bathymetric Contour Map Images. Use in combination with other Lake Bathymetric GIS products. Overlay with bathymetric contour lines to see vegetation patterns by depth. Overlay onto bathymetric DEM shaded relief image for cartographic product. Convert to grid and use with bathymetric DEM for spatial modeling (requires Spatial Analyst or Arc Grid).

Lake Bathymetric Metadata: Metadata for the Lake Bathymetry layers. Each lake is represented by a polygon. The polygon attributes contain information about when the bathymetry fieldwork was completed. This layer can be used to query for bathymetry created on or between certain dates, or to ascertain what date a particular lake was investigated. The dates are in a text field. Date formats vary from record to record.

Purpose: Contours: Limnological studies, experimental design, field studies, morphometric analyses.

DEM: Spatial modeling, slope determination, volumetric calculations, cell-based analyses.

Outline: Mapping, morphometric analyses (surface area, shoreline length).

Aquatic Vegetation: Spatial and temporal vegetation patterns, habitat availability, APR/APM permit monitoring.

Metadata: To support the use of the Lake Bathymetry layers with fieldwork dates.

Time Period of Content Date: 11/12/2014

Currentness Reference: Time Period of Content date indicates the date which the user can be confident of accuracy and completeness of the dataset. Product dates depend on field work dates related to production of original lake contour maps. Zero depth values correspond to lake shoreline and islands as digitized from 1991-92 aerial photography (1m DOQ's). See Contact Information to obtain dates for individual products.

Progress:

Maintenance and Update Frequency: As needed

Spatial Extent of Data:

Bounding Coordinates: -96.719299
-89.998661
48.559229
43.460328

Place Keywords: Minnesota

Theme Keywords: hydrography, lakes, bathymetry, contours, depth, inlandWaters, surface area, shoreline, aquatic vegetation

Theme Keyword Thesaurus:

Access Constraints: None

Use Constraints: None

Contact Person Information: Lyn Bergquist, GIS Coordinator
DNR-Fisheries
500 Lafayette Road Central Office - Box 20
Saint Paul, MN  55155
Phone: (651) 259-5189
Fax: (651) 297-4961
Email: lyn.bergquist@state.mn.us

Browse Graphic: Click to view a data sample.


Associated Data Sets:

Section 2: Data Quality

Attribute Accuracy:

Logical Consistency:

Completeness: This dataset is kept up to date with core layer dowlknum

Horizontal Positional Accuracy:


Lineage:

Section 3: Spatial Data Organization (not used in this metadata)


Section 4: Coordinate System

Horizontal Coordinate Scheme: Universal Transverse Mercator

UTM Zone Number: 15

Horizontal Datum: NAD83

Horizontal Units: meters

Vertical Datum: not applicable

Vertical Units: Not Applicable

Depth Datum: not applicable

Depth Units: Not Applicable

Section 5: Attributes

Overview:

Detailed Citation:

Table Detail:
lake_bathymetry_mapdates - table indicating date DOW Lake Bathymetry Fieldwork was done
lake_bathymetric_metadata - Feature Class Attribute Table
Field NameValid ValuesDefinitionDefinition Source
LAKE_NAME
-
Lake name per Division of Waters LKDBMAIN database
DOWLKNUMenumeratedMinnesota DNR Division of Waters Lake ID (sub-basin number;may end in '01, 02, etc.; refers to a single basin)
010001-879999The first two digits (01-87) of these composite codes denote which county the lake is in.
LKNAME
-
Lake Name
LOCATION
-
No Information Available
TILE_NAME
-
DRS directory name ("d" + "dowlknum")
MAPID
-
Lake contour map identification number
FILENAME
-
Filename and path for scanned lake contour map (.tif images) stored at: Dnrco2\Shareco2\Faw\Lakemaps
FLDW_END
-
End date of fieldwork for lake contour map
lake_bathymetric_contours
Field NameValid ValuesDefinitionDefinition Source
DEPTHenumeratedDepth
0Lake shoreline or island contour
-1 to - 200Depth (in negative feet), usually a multiple of -5
lake_bathymetric_elevation_model
Field NameValid ValuesDefinitionDefinition Source
VALUE
-
Estimated depth (in negative feet)
lake_bathymetric_outline
Field NameValid ValuesDefinitionDefinition Source
LAKE_NAME
-
Lake name per Division of Waters LKDBMAIN database
CTY_NAME
-
County name
DOWLKNUMenumeratedMinnesota DNR Division of Waters Lake ID (sub-basin number;may end in '01, 02, etc.; refers to a single basin)
010001-879999The first two digits (01-87) of these composite codes denote which county the lake is in.
ID
-
Unique ID for each basin having same DOW#
AREA
-
Surface area of lake basin in square meters.
ACRES
-
Surface area of lake basin in acres
PERFEET
-
Perimeter of lake basin (shoreline) in feet
PERIMETER
-
Perimeter of lake basin (shoreline) in meters
lake_bathymetric_aquaticveg
Field NameValid ValuesDefinitionDefinition Source
ID
-
Polygon ID#
AREA
-
Surface area of vegetation polygon in square meters.
ACRES
-
Surface area of vegetation polygon in acres
PERFEET
-
Perimeter of vegetation polygon in feet
PERIMETER
-
Perimeter of vegetation polygon in meters
VEG_TYPEenumeratedCode for aquatic vegetation type
EVEmergent vegetation
FLFloating Leaf Vegetation
MixedMixed vegetation types
SVSubmergent Vegetation
VEG_DATE
-
Field survey date for vegetation polygon (YYYYMMDD)

Section 6: Distribution

Publisher: Minnesota DNR - Fisheries

Publication Date: 2004-02-09 00:00:00.0

Contact Person Information: Zeb Thomas, GIS Data Systems Coordinator
Minnesota Department of Natural Resources
500 Lafayette Rd
Saint Paul, MN  55155
Phone: 651-259-5637
Email: zeb.thomas@state.mn.us

Distributor's Data Set Identifier: water_lake_bathymetry

Distribution Liability: The Minnesota Department of Natural Resources General Geographic Data License Agreement is online: http://www.dnr.state.mn.us/sitetools/data_software_license.html

Ordering Instructions: Please visit the download page for this dataset on the Minnesota Geospatial Commons website using the web link below (Online Linkage).

The DNR retains the copyright on these lake maps. To use any of this information commercially, you must fill out the following form and send it to MNIT@DNR FIsheries, 500 Lafayette Road, St. Paul, MN 55155-4025: http://files.dnr.state.mn.us/eco/lakemapping/agreement.pdf

Online Linkage: I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

Section 7: Metadata Reference

Metadata Date: 04/24/2015

Contact Person Information: Lyn Bergquist, GIS Coordinator
DNR-Fisheries
500 Lafayette Road Central Office - Box 20
Saint Paul, MN  55155
Phone: (651) 259-5189
Fax: (651) 297-4961
Email: lyn.bergquist@state.mn.us

Metadata Standard Name: Minnesota Geographic Metadata Guidelines

Metadata Standard Version: 1.2



This page last updated: 04/24/2015
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