This cover contains initiation location of landslides formed during Hurricane Mitch in October - November 1998. Locations were identified by manually selecting the upslope location of the landslides in the cover ls22611.
Purpose:
The cover shows the distribution of slope failures formed during Hurricane Mitch in one of twenty 1:50,000-scale maps within a large study area adjacent to the Motagua and Polochic Rivers.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 199810
Ending_Date: 199811
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.750187
East_Bounding_Coordinate: -89.499797
North_Bounding_Coordinate: 15.333401
South_Bounding_Coordinate: 15.001805
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Landslides
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Guatemala
Place:
Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0
Place_Keyword: GT = Guatemala
Temporal:
Temporal_Keyword: October 1998 - November 1998
Access_Constraints: None
Use_Constraints:
These maps are inventory maps, not hazard maps, and should not be enlarged to a scale larger than 1:50,000.
Index map showing general area of landslide assessment, 462x476 pixels, 9k bytes.
Browse_Graphic_File_Type: PNG
Data_Set_Credit:
This report is based on a cooperative study by the U.S. Geological
Survey, Denver, Colorado and the Instituto Nacional de Sismologia,
Vulcanologia, Meteorologia e Hidrologia, Guatemala City, Guatemala.
Work funded by the U.S. Agency for International Development's
Hurricane Mitch Reconstruction Program.
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 2; ESRI ArcCatalog 8.1.1.649
Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The linework was digitized manually or by an optical scanner. Landslide locations mapped using the photogrammetric plotter are estimated accurate to within 50-100 m. Locations of landslides mapped using a mirror stereoscope are estimated to be accurate to within approximately 200 m.
Lineage:
Source_Information:
Source_Scale_Denominator: 40000
Type_of_Source_Media: aerial photographs
Source_Time_Period_of_Content:
Source_Currentness_Reference: ground condition
Process_Step:
Process_Description:
Most landslides were mapped using 1:40,000-scale aerial photographs and a Kern PG-2 photogrammetric plotter at 4X and 8X magnifications. The photographs were scaled and oriented to the topographic base map using prominent topographic landmarks and plotted on a transparent polyester overlay registered to the topographic base maps at a scale of 1:50,000 or 1:25,000. In areas where landslides were very sparse, the aerial photographs were scanned with a mirror stereoscope at 4X magnification, and landslide locations were transferred to base maps by inspection. The mapped landslides were digitized manually or by an optical scanner, and the data were then digitally registered to a digital version of the base map in ArcInfo.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jonathan W. Godt
Contact_Organization: U.S. Geological Survey
Contact_Voice_Telephone: (303) 273-8626
Contact_Facsimile_Telephone: (303) 273-8600
Contact_Electronic_Mail_Address:jgodt@usgs.gov
Hours_of_Service: 0800 - 1630 Mountain Time M-F
Contact_Instructions: E-mail is preferred
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: 848
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 24
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Landslide
Entity_Type_Definition:
Polygon delineating the planimetric area of a landslide
found in coverages whose names begin with ls, ols, or yls
Attribute:
Attribute_Label: LS
Attribute_Definition:
Some regions within landslides were apparently unaffected
by the landslide (that is, they represent areas bypassed
by the landslide but are within its outer boundaries)
This attribute is used to distinguish those areas from the
landslide itself.
This report is preliminary and has not been reviewed for conformity
with U.S.Geological Survey editorial standards nor with the North
American Stratigraphic Code.Any use of trade names in this publication
is for descriptive purposes only and does not imply endorsement by the
U.S.Government.
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
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Generated by mp version 2.9.8 on Mon Nov 10 12:18:55 2008