Isanti County Aggregate Resource Evaluation - Aggregate Potential and Surficial Geology

This page last updated: 04/11/2007
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Section
Abstract This dataset consists of information about surficial geology and aggregate resource potential, based on geological factors. This work is authorized by Minnesota Statute 84.94.
Browse Graphic View a sample of the data.
Time Period of Content Date 1990
Currentness Reference Air photo interpretation 1990-1991, field work summers of 1990 and 1991.
Access Constraints NA
Use Constraints Acknowledgement of the MN DNR is appreciated in products derived from these data.
Distributor Organization Minnesota Department of Natural Resources, Division of Lands and Minerals
Ordering Instructions This and other aggregate resource data layers for Isanti County are available for download in a zipfile, isandata.zip, accessible from the MN DNR, Lands and Minerals, Aggregate Mapping web site:
http://www.dnr.state.mn.us/lands_minerals/aggregatemaps.html

Maps formatted as .pdf files can be downloaded from the same site: Aggregate Resources (isanapot.pdf) and Aggregate Resources and Quaternary Geology (isanqgeo.pdf).

Note: the web page also indicates which other counties have been mapped.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" in Section 6 of this metadata.

Full Metadata

Isanti County Aggregate Resource Evaluation - Aggregate Potential and Surficial Geology

Go to Section:
1. Identification Information
2. Data Quality Information
3. Spatial Data Organization Information
4. Spatial Reference Information
5. Entity and Attribute Information
6. Distribution Information
7. Metadata Reference Information

 
Section 1 Identification Information   Top of page
Originator Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Section
Title Isanti County Aggregate Resource Evaluation - Aggregate Potential and Surficial Geology
Abstract This dataset consists of information about surficial geology and aggregate resource potential, based on geological factors. This work is authorized by Minnesota Statute 84.94.
Purpose To summarize the aggregate resource potential of the various mapping units.
Time Period of Content Date 1990
Currentness Reference Air photo interpretation 1990-1991, field work summers of 1990 and 1991.
Progress Complete
Maintenance and Update Frequency None planned
Spatial Extent of Data Isanti County, Minnesota
Bounding Coordinates -93.51
-93.01
45.74
45.41
Place Keywords Isanti County, Minnesota
Theme Keywords geoscientificInformation, surficial geology, geological characteristics, aggregate potential
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints NA
Use Constraints Acknowledgement of the MN DNR is appreciated in products derived from these data.
Contact Person Information Dennis Martin (or Renee Johnson), Manager, Mineral Potential Section (or GIS Specialist)
Minnesota Department of Natural Resources, Division of Lands and Minerals
500 Lafayette Road
St. Paul, MN 55155-4045
Phone: 651-296-4807
FAX: 651-296-5939
E-mail: dennis.martin@dnr.state.mn.us
Browse Graphic View a sample of the data.
Browse Graphic File Description
Associated Data Sets The County Aggregate Mapping Program dataset for Isanti County is included in the file isandata.zip, accessible from the MN DNR Aggregate Mapping web page: http://www.dnr.state.mn.us/lands_minerals/aggregatemaps.html

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy The mapping units were compiled onto 1:24,000 USGS topographic maps. These delineations and unit descriptions were field checked and revised. The coverage was created by digitizing the delineations after registering the USGS maps on a digitizing table.
Logical Consistency Overshoots and undershoots were fixed by a variety of techniques, thus the lines have been checked and completed.
Completeness The units were delineated by aerial photograph interpretations. The potential of deposits is based on geologic factors, not economic factors. Generalizations were made, resulting in a product that should be considered reconnaissance level and accurate to a scale of 1:70,000.
Horizontal Positional Accuracy 1:70000
Vertical Positional Accuracy Not applicable.
Lineage These shapefiles are part of Minnesota Department of Natural Resources, Minerals Division, Report 304, Aggregate Resources and Quaternary Geology, 1992, by JD Lehr.

The data were compiled in a multi-step process. The first step developed a preliminary Quaternary geology legend after a review of the literature of glacial geology in east-central Minnesota. The map units were based on the principle that glacial depositional environments can be mapped based upon their landform expression. Additional map units were included to provide detail within potential aggregate units. Next, subsurface data were added to the compilation maps to supplement the geologic inferences, including well logs, stored in a database at the Minnesota Geological Survey entitled County Well Index (i.e., CWI) and Minnesota Department of Transportation gravel pit sheets, including shallow (10-40') test-hole logs, sieve, and quality test data.

Gravel pit locations were also added to the compilation maps and were gathered from a number of sources, including the Soil Survey of Isanti County (from the Soil Conservation Service), 15-minute USGS topographic maps, Minnesota Department of Transportation Isanti County Highway Map, Isanti County Highway Department, and field observations by the author, JD Lehr.

At this point, mapping units were delineated on 1:24000 USGS topographic maps using stereographic photo pairs at a scale of 1:90000.

During the summers of 1990 and 1991, the author made observations of the landform expression and surficial sediment, as exposed in gravel pits, road cuts, natural exposures, and excavations. Where exposures were lacking, sediment from shallow, hand-augured holes were described.

After the field work, the compilation maps were reexamined in relation to the air photos, scholarly review, and the plotted subsurface data, and adjustments were made to the mapping units as necessary.
Source Scale Denominator 62500
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment Arc/INFO 7.2.1 and Arcview 3.1 from ESRI
Geographic Reference for Tabular Data
Spatial Object Type Vector
Vendor Specific Object Types Polygon
Tiling Scheme Isanti County
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid GRS80
Horizontal Datum NAD83
Horizontal Units Meters
Distance Resolution
Altitude Datum Not applicable
Depth Datum Not applicable
UTM Zone Number 15E
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview The polygons were delineated to represent geological features, geological characteristics, and aggregate potential for sand and gravel, based on geological factors.
Entity and Attribute Detailed Citation ftp://ftp.lmic.state.mn.us/pub/dnr/attributes/sg92xpy3_att.htm
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Section
Publication Date 1992
Contact Person Information Dennis Martin
Manager, Mineral Potential Section
Minnesota Department of Natural Resources, Division of Lands and Minerals
500 Lafayette Road
St. Paul, MN 55155-4045
Phone: 651-296-4807
FAX: 651-296-5939
E-mail: dennis.martin@dnr.state.mn.us
Distributor's Data Set Identifier sg2xpy3
Distribution Liability The Minnesota Department of Natural Resources makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Natural Resources assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data.
Transfer Format Name
Transfer Format Version Number
Transfer Size 2.9 mb for data, 3.3 mb for the associated maps
Ordering Instructions This and other aggregate resource data layers for Isanti County are available for download in a zipfile, isandata.zip, accessible from the MN DNR, Lands and Minerals, Aggregate Mapping web site:
http://www.dnr.state.mn.us/lands_minerals/aggregatemaps.html

Maps formatted as .pdf files can be downloaded from the same site: Aggregate Resources (isanapot.pdf) and Aggregate Resources and Quaternary Geology (isanqgeo.pdf).

Note: the web page also indicates which other counties have been mapped.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" above.
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 04/11/2007
Contact Person Information Renee Johnson, GIS Specialist
Minnesota Department of Natural Resources, Division of Lands and Minerals
500 Lafayette Road
St. Paul, MN 55155-4045
Phone: 651-296-4807
FAX: 651-296-5939
E-mail: renee.johnson@dnr.state.mn.us
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


This page last updated: 04/11/2007