Southwest Exotic Plants Mapping Program - 1999 Regional Database

Metadata:

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:: SWEMP operates as a collaborative effort between the USGS and interested parties. The responsibilities of the USGS are to provide data entry support, database management, and data distribution. Data collection is the responsibility of the collaborators. Therefore, an estimate of accuracy regarding the plant identifications and assignments of attribute information cannot be reported. Data entry conducted by USGS personnel were double checked for accuracy. Collaborator representatives are asked to provide quality checks prior to submittal. However, once submitted, USGS personnel quality check all collaborator data for accuracy and to ensure data was submitted in the correct format. All data are compiled into MS Access and numerous "duplicate queries" (as defined by MS Access) are conducted. These queries are executed to identify any repeated records, and to ensure data is submitted in SWEMP's standardized and cosistant format. Thereafter, the data was entered into ArcView and reviewed for general spatial accuracy (i.e. if data were collected in Prescott National Forest, those data should occur within the Prescott National Forest boundary).

Logical_Consistency_Report:

Completeness_Report:

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:: Point locations were derived using either GPS with differential, GPS without differential, or by estimating and marking the location on a USGS topographic map (these data were later converted to UTMs and entered into a spreadsheet).

Vertical_Positional_Accuracy:

Lineage:

Process_Step:

Process_Description:: This database was developed by compiling raw and digital data submitted by collaborators. If raw data were submitted, SWEMP personnel entered these data into MS Excel. Digital data were compiled by importing MS Excel files, Auto-Cad files, and the *.dbf file component of an ArcView *.shp file into a temporary MS Access database for quality checks. Once all digital and raw data were processed, these data were archived and managed in an MS Access 2000 database. Data is retained in Access format for additional quality checks and data analyses. A check for infestations occuring on private lands is also conducted. If SWEMP personnel do not recieve written permission from the private landowner, UTM data are rounded to the nearest 1000 meters; by doing this, we mask the recorded location of the infestation thus protecting the rights of the private land owners. Geospatial data were converted from UTMs to "geographic" for presentation on the SWEMP Internet Map Server. Both coordinate systems are provided in the database.
Process_Date: 20000508

Spatial_Data_Organization_Information:

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Geodetic_Model:

Generated by mp on Fri May 5 13:35:49 2000