FIELD
OBSERVATIONS
DODGE COUNTY,
MINNESOTA
Field |
Description |
Main ID Information |
Metadata Updated 2007 |
Title |
Dodge County Aggregate
Resource Evaluation - Field Observations |
Filename |
Fieldobs (ArcView Shapefile) |
Abstract |
This dataset includes
information gathered in the field.
Fieldwork was completed in the fall of 2001 and spring of 2002. It includes approximately 420 field
observation sites within Dodge County and contains a field description of
each site, the dominant type of material encountered, the source of
information, type of site, unit thickness, and overburden thickness. |
Place Keywords |
Dodge County, Minnesota |
Theme Keywords |
Field Observations,
Aggregate Resources, Surficial Geology |
Time Period of
Content |
2001 |
Parent Theme |
NA |
Spatial Extent of
the Data |
Dodge County, Minnesota |
Contact Person |
Aggregate Resources
Mapping Program |
Contact Person
Organization/Division |
Department of Natural Resources,
Division of Lands and Minerals |
Contact Person
Position |
Geologist or GIS
Specialist |
Contact Address |
500 Lafayette Road, Box
45 |
Contact City |
St. Paul |
Contact Zip Code |
55155-4045 |
Contact Voice Phone |
651-259-5959 |
Contact Fax Phone |
651-296-5939 |
Additional ID
Information |
|
Originator |
Department of Natural
Resources, Division of Lands and Minerals, Mineral Potential Section |
Purpose |
To summarize the field
observations. These observations were
made to confirm air photo interpretations that identified potential aggregate
bearing landforms. |
Progress |
Complete |
Currentness
Reference |
All field observations
were completed in the fall of 2001 and spring 2002 |
Maintenance
Frequency |
None Planned |
Access Constraints |
NA |
Use Constraints |
NA |
Associated Data Sets |
County Aggregate
Mapping Program datasets for various counties, including data on sand and gravel
potential, crushed stone potential, field observations, rock piles, and test
pit quality data. |
Data Quality |
|
Attribute Accuracy |
|
Logical Consistency |
NA |
Completeness |
The data points were gathered
at the location where field observations took place. Additional information is given in the
lineage section. |
Horizontal
Positional Accuracy |
The differential
correction of the GPS unit for GPS located sites is +/- 2 meters. Some points were located on 1:24000 USGS
topographic maps. |
Vertical Positional
Accuracy |
|
Lineage |
A GPS unit was used to
determine some of the locations of the data points. These points were then downloaded and slightly revised based on
field observations, topographic maps, and aerial photographs. The GPS unit (with differential
correction) is accurate to approximately a few meters. Other points were located on 1:24000 USGS
topographic maps and 1:40000 aerial photographs. These coordinates were then checked with field notes and
topographic maps to assure accuracy. |
Source Scale
Denominator |
24000 |
Spatial Reference |
|
Horizontal
Coordinate Scheme |
UTM |
Ellipsoid |
GRS80 |
Horizontal Datum |
NAD83 |
Horizontal Units |
Meters |
Distance Resolution |
NA |
Altitude Datum |
NA |
Altitude Units |
NA |
Depth Datum |
NA |
Depth Units |
NA |
UTM Zone Number |
15E |
Raster only |
|
Cell Width |
NA |
Cell Height |
NA |
Spatial Data
Organization |
|
Geographic Reference
for Tabular Data |
NA |
Native Dataset
Environment |
ArcView 3.1 and ArcInfo
8.0.2 |
Vendor Specific
Object Type |
Point |
Tiling Scheme |
County |
Spatial Object Type |
Point |
Transfer Size |
123 kb |
Entities --
Attributes |
|
Entity-Attribute Overview |
This dataset consists
of field observation site locations, type of site, unit thickness, and
overburden thickness. ArcView specific fields
include shape (i.e., feature type = point), area (0 for points), perimeter (0
for points), fieldobs_ (unique id for point, assigned by software),
fieldobs_id (an id usually assigned during theme creation. |
Entity-Attribute
Detailed Citation |
The field observation
specific attributes are described in the table below. |
Table Name |
Field Name |
Begin Column |
Definition |
Valid Values |
Descriptions |
fieldobs.dbf |
Ident |
|
Text, 24 |
Ex: 001, A-1, B-3, etc… |
Unique Identifiers used
in the field, letters have no significance.
|
|
Lat |
|
Number, 12, 8 |
44.0610976 |
Latitude locations
identified by a GPS unit. |
|
Long |
|
Number, 12, 8 |
-92.75199481 |
Longitude locations
identified by a GPS unit. |
|
Site_type1 |
|
Text, 16 |
Drill Hole |
Test hole drilled with a
Giddings Soil Probe. |
|
|
|
|
Excavation |
Badger Holes, Trenches,
Construction Areas, or Foundations |
|
|
|
|
Exposure |
Bedrock exposures. |
|
|
|
|
Gravel Pit |
Gravel Pits Exposing
Sand and Gravel Material. |
|
|
|
|
Outcrop |
Stream, Road-Cut, Bank,
Judicial Ditch, or Slump. |
|
|
|
|
Quarry |
An existing quarry
exposing bedrock. |
|
|
|
|
Other |
Observed Vegetative
trends, story of a land owner, etc... |
|
Site_type2 |
|
Text, 16 |
Back Hoe |
A hole dug by a back
hoe. |
|
|
|
|
Basement |
Excavation of a
basement. |
|
|
|
|
Bees Nest |
Mound in earth occupied
by bees/ flying insects. |
|
|
|
|
Burrow Pit |
A mined pit for
construction material |
|
|
|
|
Construction |
Mining for fill material
and/or other construction. |
|
|
|
|
Ditch |
Material exposed in a
ditch due to a slump or landscaping that has removed vegetation. |
|
|
|
|
Drill Hole |
Test hole drilled with
an 8 inch auger. |
|
|
|
|
Foundation |
Material exposed in the
digging of a basement/foundation. |
|
|
|
|
Gravel Pit |
Materials exposed in
gravel pit. |
|
|
|
|
Gully |
Material exposed in a
gully. |
|
|
|
|
Hill Cut |
Material exposed on a
cow path. |
|
|
|
|
Judicial Ditch |
Materials exposed in
manmade ditch. |
|
|
|
|
Large Trench |
Material exposed by
trenching with bulldozer. |
|
|
|
|
Ledge |
Bedrock exposure as a
ledge in a stream. |
|
|
|
|
Quarry |
Bedrock units exposed
in a quarry. |
|
|
|
|
Retaining Wall |
Material exposed in a
erosion of a retaining wall. |
|
|
|
|
River Cut |
Stream exposed an area. |
|
|
|
|
Road Cut |
Materials exposed in a
road cut |
|
|
|
|
Stream Sediment |
Exposure of sediment in
stream |
|
|
|
|
Surface |
Exposures of
bedrock/material on the ground
surface. |
|
|
|
|
Tiling Trench |
Trenches for pipelines,
tiling, cables, etc. |
|
|
|
|
Tree Tip |
Bedrock material
exposed in the roots of a tree tip. |
|
|
|
|
Trench |
Any trench exposure of
material. |
|
|
|
|
Vegetation |
Noting material by type
of vegetation that grows on surface. |
|
Field_stop |
|
Number, 3, 0 |
0, 1, 2, 3, 4, 5, etc… |
Unique identifiers for
each field point. |
|
Material_1 |
|
Text, 16 |
Ex: Sand, Gravel, Clay,
Silt, Limestone, Sandstone. |
Describes the primary
type of material encountered at each observation site. |
|
Material_2 |
|
Text, 16 |
Ex: Sand, Gravel, Clay,
Silt, Limestone, Sandstone. |
Describes the secondary
(not primary) type of material at each observation site. |
|
Fielddesc |
|
Text, 80 |
Ex: Drill Hole (0-9
ft) 0-6 Till, 6-9 Gravel. |
A short field
description of the observation site. |
|
Unitthick |
|
Text, 8 |
Ex:0, 4, 5, 8, 12,
>3, >5, >10, etc... |
A description of the
thickness of the unit in feet, with “<“ or “>” modifiers. |
|
Overthick |
|
Text, 8 |
Ex: <3, 6, <5,
>5, >20, etc... |
A description of the
thickness of the overburden covering the unit, with “<“ or “>”
modifiers. |
|
Unitsamp |
|
Text, 4 |
Yes or No |
Indicates whether the
material was sampled. Not all sampled
material was tested. |
|
Gravelpct |
|
Number, 11, 0 |
40, 30, 20 |
The estimated amount of
gravel in the sample taken. |
|
Thickmod |
|
Text, 4 |
> |
Modifies the Thick
(i.e., Thickness field). Greater Than |
|
|
|
|
< |
Less Than. |
|
|
|
|
~ |
Approximately. |
|
Thick |
|
Number, 11, 0 |
Ex: 10, 15, 30, 40 |
Describes the thickness
of the unit at the observation site in feet. |
|
Overmod |
|
Text, 4 |
> |
Modifies the Over
(Overburden Field). Greater Than. |
|
|
|
|
< |
Less Than. |
|
|
|
|
~ |
Approximately. |
|
Over |
|
Number, 11, 0 |
Ex: 5, 10, 15, 20 |
The thickness of the
overburden observed and estimated in feet. |
|
Sampleid |
|
Number,3,0 |
Ex: 23, 51 |
Sampleid is used to
relate this shapefile to sieve.dbf.
These records are drill holes, which were sampled and tested for
textural characteristics based on a sieve analysis. |