DLG-F HYDROGRAPHY, 1999

 

SCOPE OF WORK

 

PROPOSED ACTIVITIES

 

The Contractor will:

 

1.  Provide all necessary personnel, equipment, and facilities required to produce a seamless statewide hydrographic database to USGS DLG-F standards in ESRI data format.  Technical abstract and collection techniques detailed in Attachment B.

 

2.  Provide completed DLG-F data sets to the Georgia GIS Data Clearinghouse for review and acceptance.  The following ESRI coverages will be provided for each county listed in the delivery schedule (Attachment D):

a.         Hydro_Lines

b.         Hydro_Polygons

 

3.  Adhere to the “Geographic Information Systems Standards and Guidelines for the state of Georgia.” 

 

4.  Adhere to the feature content documented in the National Mapping Program’s Technical Instructions, Part 2 Hydrography, “Standards for Hydrography Dataset – High Resolution,” with modifications approved by the GIS Coordinating Committee’s Data Development TWG.  Attachment C defines the technical specifications of the data features and attribution to be collected.

 

5.  Submit quarterly progress reports summarizing base map activities.

 

The ITPC will:

 

1.  Provide to the Contractor on request current versions of all relevant standards.


ATTACHMENT B

TECHNICAL ABSTRACT

 

When the Georgia DOT started a digital automated mapping program in 1993, it captured many valuable layers of spatial information that could be integrated into a statewide GIS Base Map.  The hydrographic layer captured by Georgia DOT was derived from the 1:24,000-scale USGS quadrangle maps.  Mylar color quadrangle separates were purchased from the USGS, scanned, vectorized, georeferenced, edge matched, tiled by county, and added to the digital map library.  QA/QC has been performed by both the Cartographic Unit of the Georgia Department of Transportation and mapping staff at the Office of Information Technology Outreach Services, University of Georgia.

 

Georgia has since acquired statewide DOQ coverage in cooperation with the USGS.  By using DOQ imagery, features in the digital map library can adjusted from the 1:31,680-scale feature representation to the 1:12,000-scale DOQQ image.  With these resources available, the state now looks ahead to an Innovative Partnership with the USGS to photo-revise and update the feature

and attribute content for the core base map.

 

Technical Description of Wetlands polygon vector data

 

Abstract - County tiled polygons and lines representing lakes, ponds, islands, reservoirs, and swamps/marshes.

 

Source Graphic - Original digitization from USGS “blue layer” color separates (1:24,000-scale mylar source document).  Photo-revision to 1993 USGS Digital Orthophoto Quarter Quadrangles (1:12,000-scale digital image) has been performed for some features in the Wetlands layer.  The approximate horizontal accuracy of photo-revised features is 33.3-ft., assuming the source imagery meets National Map Accuracy Standards for 1:12,000.  Features which have not been photo-revised have an approximate horizontal accuracy of 40-ft., assuming the USGS color separates meet National Map Accuracy Standards for 1:24,000.  All feature coordinates are stored in UTM meters on NAD83.

 

Wetlands layer data processing summary

 

Historical - Original mylar, 1:24,000-scale “blue layer” color separates were scanned at 400dpi resolution with an Intergraph Eagle large format scanner.  Initial vectorization was performed using GENASYS’ Genarave raster to vector conversion software.  Features were later converted to ESRI’s Arc/Info (Solaris versions 6.x through 7.x) software.  The Wetlands layer was initially registered to Geographic Coordinates and later projected to UTM NAD83 meters with respect to the appropriate UTM zone (16 or 17 in Georgia).  

 

Arc/Info coverages were plotted to scale and overlaid on the source mylar for QA/QC of the original vectorization.  7.5 Minute Quadrangle tiled coverage features were edge-matched to adjacent features using Arcedit snapping and link adjustment utilities.  QA/QC has been performed by both the Cartographic Unit of the Georgia Department of Transportation and mapping staff at the Office of Information Technology Outreach Services, University of Georgia.  The QA/QC process relies heavily on scale check-plotting and on-screen visual examination of feature attributes and alignment using Arcview 3.0.  Coverages are in Arc/Info 7.04 double precision format.

 

Proposed - Under this agreement, shorelines of waterbody features in the Wetlands layer will be adjusted from the 1:24,000-scale feature representation to the 1:12,000-scale DOQQ image utilizing rules outlined in the USGS’ NMD Technical Criteria for Digital Revision and Product Generation:  1:24,000-Scale Digital Line Graphs and Quadrangle Maps.  Feature updates, which were excluded in previous DOT updating efforts, will be added to reflect the content of the DOQs.   In the update process, new features will digitized on-screen using a USGS Digital Orthophoto Quarter Quadrangle base.  Existing water body features will be photo-revised by digitizing the feature from the photography.  QA/QC will be performed by both the Office of Information Technology Outreach Services, University of Georgia, and the USGS.  The QA/QC process will rely heavily on 1:24,000-scale checkplots and on-screen visual examination of feature attributes and alignment using Arcview 3.0.  The Wetlands layer will be made available to the USGS in Arc/Info export format of  version 7.1.1 double precision coverages.  Metadata for the Wetlands layer will document specifically which digital capture and/or update methodology was utilized for a given Wetlands feature.

 

Technical Description of River line vector data

 

Abstract - County tiled lines representing rivers, streams, shorelines, watercourses and artificial flow paths.

 

Source Graphic - Original digitization from USGS “blue layer” color separates (1:24,000-scale mylar source document).  Photo-revision to 1993 USGS Digital Orthophoto Quarter Quadrangles (1:12,000-scale digital image) has been performed for some features in the River layer.  The approximate horizontal accuracy of photo-revised features is 33.3-ft., assuming the DOQ imagery meets National Map Accuracy Standards for 1:12,000.  Features which  have not been photo-revised have an approximate horizontal accuracy of 40-ft., assuming the USGS color separates meet National Map Accuracy Standards for 1:24,000.  All feature Coordinates are stored in UTM meters on NAD83.

 

River layer data processing summary

 

Historical - Original mylar, 1:24,000-scale “blue layer” color separates were scanned at 400dpi resolution with an Intergraph Eagle large format scanner.  Initial vectorization was performed using GENASYS’ Genarave raster to vector conversion software.  Features were later converted to ESRI’s Arc/Info (Solaris versions 6.x through 7.x) software.  The River layer was initially registered to Geographic Coordinates and later projected to UTM NAD83 meters with respect to the appropriate UTM zone (16 or 17 in Georgia).   Coverages were plotted to scale and overlaid on the source mylar for QA/QC of the original vectorization.  7.5 Minute Quadrangle tiled coverage features were edge-matched to adjacent features using Arcedit snapping and link adjustment utilities.  QA/QC has been performed by both the Cartographic Unit of the Georgia Department of Transportation and mapping staff at the Office of Information Technology Outreach Services, University of Georgia.  The QA/QC process relies heavily on 24,000-scale check-plotting and on-screen visual examination of feature attributes and alignment using Arcview 3.0.  Coverages are in Arc/Info 7.04 double precision format.

 

Proposed - Under this agreement, shorelines of river features in the River layer will be adjusted from the 1:24,000-scale feature representation to the 1:12,000-scale DOQQ image utilizing rules outlined in the USGS’ NMD Technical Criteria for Digital Revision and Product Generation:  1:24,000-Scale Digital Line Graphs and Quadrangle Maps.  Creek and stream features depicted as single centerlines at 1:24,000-scale will not be photo-revised.  Feature updates, which were excluded in previous DOT updating efforts, will be added to reflect the content of the DOQs.   In the update process, new features will digitized on-screen using a USGS Digital Orthophoto Quarter Quadrangle base.  Existing features will be photo-revised by digitizing the feature from the photography.  Stream segments and artificial paths will be flipped (if necessary) to match the direction of stream flow.  Stream segments will also be adjusted so they match the exit points of Hydrologic Unit Code (HUC) basins (using 1:24,000-scale HUCs where available).

 

QA/QC will be performed by both the Office of Information Technology Outreach Services, University of Georgia, and the USGS.  The QA/QC process will rely heavily on 1:24,000-scale check plots and on-screen visual examination of feature attributes and alignment using Arcview 3.0.  The River layer will be made available to the USGS in Arc/Info export format of  version 7.1.1 double precision coverages.  Metadata for the River layer will document specifically which digital capture and/or update methodology was utilized for a given feature.

 

 


 

 


ATTACHMENT C

 

 

 

 

 

DLG-F Data Dictionary

 


Hydrography

 

 

 

 

 

 

 

Compiled by:

Information Technology Outreach Services

University of Georgia

December 18, 1998

DLG-F Feature:

 

Area of Complex Channels

Definition:

An area where a stream or river flows in an intricate network of interlacing channels.

 

Feature Classes:

Area

 

Coverage Name:

 

 

HY_POLY

 

Attribute Table:

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the corresponding hydrologic feature.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Artificial Path

Definition:

 

An artificial transport path through an open water body that provides connectivity for stream networking.

Feature Classes:

Line

 

Coverage Name:

 

HY_LINE

Attribute Table:

 

HY_LINE.AAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

Feature Type

FEATURE_

TYPE

Character 25

Canal/Ditch

Lake/Pond

Reservoir

Stream/River

Swamp/Marsh

The type of 2-D feature through which the artificial path flows.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the corresponding 2-D feature.

Class

CLASS

Character 10

Major

Minor

Major = stream is part of the RF1 database.

Minor = stream is not part of the RF1 database.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Canal/Ditch

Definition:

 

An artificial open waterway constructed to transport water, to irrigate or drain land, to connect two or more bodies of water, or to serve as a waterway for watercraft.

 

Feature Classes:

Line

Area

 

Coverage Name:

 

HY_LINE

HY_POLY

 

Attribute Table:

 

HY_LINE.AAT

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

Feature Type

FEATURE_TYPE

Character 25

Aqueduct

Unspecified

Aqueduct

Unspecified

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the corresponding hydrologic feature.

Class

CLASS

Character 10

Major

Minor

Major = stream is part of the RF1 database.

Minor = stream is not part of the RF1 database.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Closure

Definition:

 

An artificial line segment used to close polygon features where no natural shoreline occurs.  Necessary for maintaining polygon topology.

Feature Classes:

Line

 

Coverage Name:

 

HY_POLY

Attribute Table:

 

HY_POLY.AAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Connector

Definition:

A known, but nonspecific, connection between two nonadjacent  network segments.

Feature Classes:

Line

 

Coverage Name:

HY_LINE

Attribute Table:

HY_LINE.AAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Class

CLASS

Character 10

Major

Minor

Major = stream is part of the RF1 database.

Minor = stream is not part of the RF1 database.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.

 


 

DLG-F Feature:

 

Estuary

Definition:

 

The lower end of a river, or a semienclosed coastal body of water with access to the open ocean, which is affected by the tides and where fresh and salt water mix.

 

Feature Classes:

Area

 

Coverage Name:

 

HY_POLY

Attribute Table:

 

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the lake or pond.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.

 


 

DLG-F Feature:

 

Lake/Pond

Definition:

 

A standing body of water with a predominately natural shoreline surrounded by land.

Feature Classes:

Area

 

Coverage Name:

 

HY_POLY

Attribute Table:

 

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the lake or pond.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.

 


 

DLG-F Feature:

 

Pipeline

Definition:

 

A closed conduit, with pumps, valves and control devices, for conveying fluids, gases, or finely divided solids.

 

Feature Classes:

Line

 

Coverage Name:

 

HY_LINE

 

Attribute Table:

 

HY_LINE.AAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

Feature Type

FEATURE_TYPE

Character 25

Aqueduct

General Case

Penstock

Siphon

Aqueduct

General Case

Penstock

Siphon

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the corresponding hydrologic feature.

Class

CLASS

Character 10

Major

Minor

Major = stream is part of the RF1 database.

Minor = stream is not part of the RF1 database.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Reservoir

Definition:

 

A constructed basin formed to contain water or other liquids.

 

Feature Classes:

Area

 

Coverage Name:

 

HY_POLY

Attribute Table:

 

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the reservoir.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.

 


 

DLG-F Feature:

 

Shoreline

Definition:

 

A naturally occurring line of contact between a body of water and the land.

Feature Classes:

Line

Coverage Name:

HY_POLY

Attribute Table:

HY_POLY.AAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

Feature Type

FEATURE_TYPE

Character 25

Bay/Inlet

Canal/Ditch

Estuary

Lake/Pond

Reservoir

Swamp/Marsh

Stream/River

Sea/Ocean

Bay/Inlet = shoreline of a bay or inlet.

Canal/Ditch = shoreline of a canal or ditch (for canals depicted as area features).

Estuary = shoreline of an estuary.

Lake/Pond = shoreline of a lake or pond.

Reservoir = shoreline of a reservoir.

Swamp/Marsh = shoreline of a swamp or marsh.

Stream/River = shoreline of a stream or river (for rivers depicted as area features).

Sea/Ocean = shoreline of a sea or ocean.

 

See note below table.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.

 

Note: Where a shoreline occurs between two different area features, the feature type will be assigned using the following order of precedence:  Sea/Ocean, Bay/Inlet, Estuary, Lake/Pond, Reservoir, Stream/River, Canal/Ditch, and Swamp/Marsh.


 

DLG-F Feature:

 

Stream/River

Definition:

 

A body of flowing water.

Feature Classes:

Line

Area

 

Coverage Name:

 

HY_LINE

HY_POLY

 

Attribute Table:

 

HY_LINE.AAT

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

Feature Type

FEATURE_TYPE

Character 25

Intermittent

Perennial

Intermittent = stream identified as intermittent on USGS 7.5-minute quadrangle map.

Perennial = stream identified as perennial on USGS 7.5-minute quadrangle map.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the corresponding hydrologic feature.

Stream Class

CLASS

Character 10

Major

Minor

Major = stream is part of the RF1 database.

Minor = stream is not part of the RF1 database.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.


 

DLG-F Feature:

 

Swamp/Marsh

Definition:

 

A non-cultivated, vegetated, area that is inundated or saturated for a significant part of the year. 

The vegetation is adapted for life in saturated soil conditions.

 

Feature Classes:

Area

 

Coverage Name:

 

HY_POLY

Attribute Table:

 

HY_POLY.PAT

 

DLG-F Attribute

 

Arc/Info Item

 

Data Type

 

Attribute Domain

 

Definition

Feature

FEATURE

Character 25

Alphanumeric

The name of the DLG-F feature.

Feature ID

FEATURE_ID

Character 10

Alphanumeric

Unique permanent feature ID.

State FIPS Code

STATE_FIPS

Character 2

2-digit integer

FIPS code of the state containing the feature.

County FIPS Code

COUNTY_FIPS

Character 3

3-digit integer

FIPS code of the county containing the feature.

Hydrologic Unit Code

HUC

Character 8

8-digit integer

The 8-digit hydrologic unit code (HUC) of the basin containing the feature.

Name

NAME

Character 32

Alphanumeric

The place name of the lake or pond.

Source

SOURCE

Character 32

Alphanumeric

Source data from which the feature was captured.

Editor

EDITOR

Character 32

Alphanumeric

Entity that performed feature updates.

Source Date

SOURCE_DATE

Date

Date

Date of the source data.

Feature Modification Date

FEAT_MOD_DATE

Date

Date

Date when feature was last updated.



 

 

DELIVERY SCHEDULE

 

 

 



Delivery Quarter / Month

 

Quad-area (7.5 minute quadrangles contained within the county line).

 

1st Quarter, September  1999

275

 

2nd Quarter, December 1999

275

 

3rd Quarter, March 2000

275

 

4th Quarter, June 2000

297

 

 

 

 

Total Quadrangle Equivalents

1,122