Carlton County Geologic Atlas Part B

AQBDELPY metadata
Elevation of the top of the Buried Aquifers

Description of data created for County Geologic Atlas Series C-19

Metadata created using Minnesota Geographic Metadata Guidelines version 1.2
Metadata content prepared 2011-08-18

Section 1

Identification Information - - - - - - top

Originator

Minnesota DNR Division of Ecological and Water Resources - County Geologic Atlas and Regional Hydrogeologic Assessment Program

Title

 AQBDELPY

System Name

Abstract

Modeled elevation of the top of the buried aquifers

Purpose

County Geologic Atlas and Regional Hydrogeologic Assessment Program,
Carlton County Geologic Atlas, Part B, County Geologic Atlas Series C-19

Time Period of Content Date

August, 2011

Currentness Reference

Publication date

Progress

Complete

Maintenance and Update Frequency

None Planned

Spatial Extent of Data

Carlton County, Minnesota

Bounding Coordinates

Place Keywords

Minnesota, Carlton County

Theme Keywords

aquifer elevation, top of aquifer, buried aquifer

Theme Keyword Thesaurus

None

Access Constraints

None

Use Constraints

Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.

Contact Person Information

See Metadata Reference Information section, below

Browse Graphic File Name

Browse Graphic File Description

Associated Data Sets

Carlton County Geologic Atlas, Part A, County Geologic Atlas Series C-19, published by the Minnesota Geological Survey, 2009. More information and downloadable data for Part A available on the MGS ftp site.

Section 2

Data Quality Information - - - - - - top

Attribute Accuracy

Logical Consistency

Data are topologically correct using ArcGIS 10.0

Completeness

Complete

Horizontal Positional Accuracy

unknown

Vertical Positional Accuracy

not applicable

Lineage

The grid shapefiles for the tops of the buried aquifers were derived from the MGS grid files. Three of the files representing the tops of the sm, sl, and sc sand units were modified to represent only the buried portions of these units. The remaining units (si, sts, stw, and su) required no modification.

The modifications to sand units sm, sl, and sc, were made with the following steps. First the surficial portions of the units were removed by finding which portions of the top grid files were below the base of the surface sand (GRID A). Another calculation was made to determine which portions of the base files were below the base of the surficial sand (GRID B). A third calculation was made to determine the extent of the cut-in portions (buried sand that was actually surficial sand, GRID C). The newly calculated cut-in grids were converted to polygon files to be used as masks. The cut-in grid mask was used to extract values from the base of the surficial sand grid to be used as modified top values for the cut-in portions of the sand units. Grids A and C were combined with conditional statements in spatial analyst to produce the final grids.

Source Scale Denominator

300000

Section 3

Spatial Data Organization Information - - - - - - top

Native Data Set Environment

ArcGIS 10.0

Geographic Reference for Tabular Data

Not Applicable

Spatial Object Type

Vector

Vendor Specific Object Types

polygon

Tiling Scheme

state

Section 4

Spatial Reference Information - - - - - - top

Horizontal Coordinate Scheme

UTM

Ellipsoid

GRS1980

Horizontal Datum

NAD83

Horizontal Units

meters

Distance Resolution

meters

Altitude Datum

n/a

Altitude Units

n/a

Depth Datum

n/a

Depth Units

n/a

Cell Width

0

Cell Height

0

Latitude Resolution

0

Longitude Resolution

0

UTM Zone Number

15

SPCS Zone Identifier

0

County Coordinate Zone Identifier

0

Coordinate Offsets or Adjustments

n/a

Map Projection Name

n/a

Map Projection Parameters

n/a

Other Coordinate System's Definition

n/a

Section 5

Entity and Attribute Information - - - - - - top

Entity and Attribute Overview

Entity and Attribute Detailed Citation

HTML Table (Not Available)

Section 6

Distribution Information - - - - - - top

Publisher

Minnesota DNR Division of Ecological and Water Resources

Publication Date

2011

Contact Person Information

See Metadata Reference Information section, below

Distributor's Data Set Identifier

AQBDELPY

Distribution Liability

This map was prepared from publicly available information only. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map is based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data.

Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Geological Survey and the Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.

Transfer Format Name

shapefile

Transfer Format Version Number

Transfer Size

Ordering Instructions

Download ArcGIS shapefiles from:
Carlton County Geologic Atlas, Part B: Metadata for GIS and Digital Data

Online Linkage

Carlton County Geologic Atlas, Part B: Metadata for GIS and Digital Data

Section 7

Metadata Reference Information - - - - - - top

Metadata Date

2011-08-18

Contact Person Information

GIS Specialist, Atlas/Assessment Program
Minnesota DNR - Division of Division of Ecological and Water Resources
500 Lafayette Road
Saint Paul, MN 55155
Phone: (651) 259-5693 or (651) 259-5700
FAX: (651) 296-0445
E-mail:

Metadata Standard Name

Minnesota Geographic Metadata Guidelines

Metadata Standard Version

1.2

Metadata Standard Online Linkage

http://www.lmic.state.mn.us/gc/stds/metadata.htm