- Process_Description:
- Dataset was downloaded by GeoPlan in shapefile format from FDEP (http://www.dep.state.fl.us/gis/datadir.asp) Converted the field COUNTY to FGDLCODE equivilent attribute labels, then deleated COUNTY field.
Added the field NAME to define the attributes of the FGDLCODE field.
The dataset's prior history is below.
Description of Source Materials:
SOURCE TITLE : Air Quality System
SCALE : N/A
DATUM : NAD1927
MAP PROJECTION : UTM Zones 16 and 17
MEDIA OF SOURCE : Spreadsheet on diskette
CONDITION OF MEDIA :
DATE OF SOURCE MATERIAL : August 1997
UPDATE SCHEDULE : Annual
Creator of Source or Data Layer:
AGENCY/ORGANIZATION : Air Resources Management
UNIT/SECTION : Bureau of Air Monitoring and Mobile Sources
CONTACT PERSON : Brian Kerckhoff
TITLE : Environmental Manager
PHONE NUMBER : 850/488-6140
Derivation Method(s) for Data:
PRE-AUTOMATION COMPILATION :
COMPUTER HARDWARE USED : HP Workstation
OPERATING SYSTEM : UNIX
GIS/MAPPING SOFTWARE AND VERSION USED : ArcView 3.0a + ARC/INFO 7.1.1
Explanation of Procedures Used to Transform the Data:
Locational data was obtained by two methods. Sites in Broward and Hillsborough Counties were obtained using a Trimble PRO/XL GPS unit with differential correction. The rest of the sites were derived through interpolation from 1 : 24,000 USGS 7.5' Quad Sheets.
Original spreadsheet of Ambient Air Monitoring Sites contained sites in both UTM Zone 16 and UTM Zone 17, so records were separated into two tables. In ArcView 3.0a, the tables were used to create event themes which were converted to shapefiles. In ARC/INFO 7.1.1, the shape files were converted to coverages using the SHAPEARC command, each were projected from their respective UTM Zones into DEP's Albers projection. Now in a common projection, the two coverages were merged using the APPEND command.