nic_ipdd

Metadata also available as

Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Susan H. Cannon

Originator: Kathleen M. Haller

Originator: Ingrid Ekstrom

Originator: Eugene S. Schweig III

Originator: Graziella Devoli

Originator: David W. Moore

Originator: Sharon A. Rafferty

Originator: Arthur C. Tarr

Publication_Date: 2001

Title: nic_ipdd

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Publication_Information:

Online_Linkage: \\deathstar\centam\nic\base\data\50k\drg\nic_ipdd

Larger_Work_Citation:

Citation_Information:

Originator: Susan H. Cannon

Originator: Kathleen M. Haller

Originator: Ingrid Ekstrom

Originator: Eugene S. Schweig III

Originator: Graziella Devoli

Originator: David W. Moore

Originator: Sharon A. Rafferty

Originator: Arthur C. Tarr

Publication_Date: 2001

Title:

LANDSLIDE RESPONSE TO HURRICANE MITCH RAINFALL IN SEVEN STUDY AREAS IN NICARAGUA

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report
Issue_Identification: 01-412-A

Publication_Information:

Publication_Place: Denver, Colorado
Publisher: U.S. Geological Survey

Online_Linkage: <http://greenwood.cr.usgs.gov/pub/ofr-01-412-A>

Description:

Abstract:: We present an inventory of the initiation locations of landslides triggered by the passage of Hurricane Mitch, October 21-31, 1998 in seven study areas in Nicaragua. The inventory was compiled from aerial photographs and field mapping. Most (perhaps 95%) of the landslides at the mapped initiation locations produced debris flows. The remaining 5% of mapped initiation locations were slow-moving earth flows that started moving during Hurricane Mitch and continued to move for at least one year.
Purpose:: The passage of Hurricane Mitch through Central America in October and November 1998 caused widespread and devastating flooding and landsliding. In this data set we document the locations where landslides initiated in response to the rainfall that accompanied Hurricane Mitch in seven study areas in Nicaragua.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: October 1998

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -86.891144
East_Bounding_Coordinate: -85.780037
North_Bounding_Coordinate: 13.781081
South_Bounding_Coordinate: 12.832439

Keywords:

Theme:

Theme_Keyword_Thesaurus: <http://edcnts11.cr.usgs.gov/theo/>
Theme_Keyword: Landslides
Theme_Keyword: Hurricane Mitch
Theme_Keyword: rainfall
Theme_Keyword: debris flow
Theme_Keyword: earth flow
Theme_Keyword: debris-flow susceptibility

Theme:

Theme_Keyword: landslides
Theme_Keyword: Hurricane Mitch
Theme_Keyword: rainfall
Theme_Keyword: debris flow
Theme_Keyword: earth flow
Theme_Keyword: debris-flow susceptibility

Place:

Place_Keyword: Nicaragua
Place_Keyword: Departamento de Jinotega
Place_Keyword: Departamento de Leon
Place_Keyword: Departamento de Esteli
Place_Keyword: Departamento de Matagalpa
Place_Keyword: Departamento de Nueva Segovia
Place_Keyword: Departamento de Chinandega

Temporal:

Temporal_Keyword: October 1998

Access_Constraints: None

Use_Constraints:

Should only be used in maps whose scale is smaller than 1:50,000.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Susan H. Cannon
Contact_Organization: U.S. Geological Survey

Contact_Position: Geologist

Contact_Address:

Address_Type: mailing address
Address: USGS, MS 966
Address: Denver Federal Center
Address: Box 25046
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046
Country: USA

Contact_Voice_Telephone: (303) 273-8604

Contact_Facsimile_Telephone: (303) 273-8600

Contact_Electronic_Mail_Address: cannon@usgs.gov

Hours_of_Service: 0800 - 1630 Mountain Time M-F

Security_Information:

Security_Classification: Unclassified

Native_Data_Set_Environment:

Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 1; ESRI ArcCatalog 8.1.1.649

Cross_Reference:

Citation_Information:

Series_Information:
Publication_Information:

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: Attribute accuracy was assured by visually comparing the compilation copy with the plotted map on which the landslide initiation locations were mapped.

Logical_Consistency_Report:

Registration accuracy was checked by inspecting plots of the data and graticule overlaid on a Digital Raster Graphic (DRG) of the base map. This assured that the initiation points fell within the landslide polygons.

Completeness_Report:

Completeness was assured by visually inspecting the compilation map overlaid on the plotted map looking for missing initiation points.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: The small scale of the aerial photographs, and the mapping method of manually transferring observed features to the base maps, dictates that the locations of the landslide initiation locations are accurate to within about 200m.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Defense Threat Reduction Agency
Geospatial_Data_Presentation_Form: aerial photographs
Online_Linkage: <http://www.mitchnts1.cr.usgs.gov.data.aerial.html>

Source_Scale_Denominator: 60000

Type_of_Source_Media: aerial photographs

Source_Time_Period_of_Content:

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Open-Skies Program

Source_Information:

Source_Scale_Denominator: 30000
Type_of_Source_Media: aerial photographs
Source_Citation_Abbreviation: Open Skies Program

Process_Step:

Process_Description:: Aerial photographs taken between December 4 and December 19, 1998 under the Open Skies program of the Defense Threat Reduction Agency (<http://www>. mitchnts1.cr.usgs.gov.data.aerial.html) were used to map the intiation locations of the landslides shown on the maps. The aerial photographs are at 1:60,000-scale, and 1:30,000-scale for portions of the Matagalpa and Jinotega/San Rafael del Norte study areas. Digital Raster Graphic (DRG) scanned images of 1:50,000-scale quadrangles projected to Transverse Mercator were used as base maps for the mapping. We mapped landslides by first identifying them on the aerial photographs using a mirror stereoscope and then manually plotting each landslide and its affected area by inspection onto the base maps. In some cases, the base maps were enlarged to 1:25,000-scale to facilitate mapping.

Process_Step:

Process_Description:: Field reconnaissance from April 25 through May 6, 2000 resulted in limited verification of the landslide and related effects mapping. Because of the large areal extent of the study areas and difficulties of access, we visited only a few, small areas. We observed as few as 5% of the landslides in some study areas and as many as 40% of the landslides in others. During this reconnaissance, we mapped the locations and extents of some landslides outside the coverage of the aerial photography. This mapping represents only features that we observed, and is not representative of all the landslide activity in the area.

Process_Step:

Process_Description:: Following field verification, a point representing the initiation location of each landslide was digitized. This point was located as the highest elevation point within the landslide polygon.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Entity point
Point_and_Vector_Object_Count: 8645

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 4100

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 16

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geographic:

Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees

Geodetic_Model:

Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: nic_ipdd.pat
Entity_Type_Definition: Polygon attribute table

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: ESRI