Using geospatial PDFs

August 1, 2017

This paper provides an overview of geospatial PDFs and their basic features, as well as some of the tools available to interact with these files. Information is also provided on more complex software tools designed to manipulate and create geospatial PDFs, as well as several mobile apps. This paper focuses on USGS US Topos as a case study, since these maps are widely used.

Elevation/LiDAR Data

July 13, 2017

Sources of Wisconsin elevation data derived primarily from LiDAR.

Satellite Imagery Data

Historically, satellite observations of the Earth’s atmosphere, land, and oceans have been acquired via satellites operated by federal agencies and space programs. Commercial sources are increasingly available and can supply very high resolution imagery to users for a fee. Both real-time and archived data are available from a variety of public sources.

Topographic Maps

The U.S. Geological Survey (USGS) produces 1:100,000-scale county maps for each of the 72 counties in Wisconsin. These maps show topographic features including contours and elevation in meters, highways, roads and other manmade structures, water features, woodland areas, and geographic names. These maps vary in size depending on the particular county. USGS county maps in Wisconsin were generally produced between 1976 and 1990.

USGS now accepting proposals for FY15/16 3D Elevation Program

July 23, 2015

The U.S. Geological Survey recently issued the FY15/FY16 Broad Agency Announcement (BAA) for their 3D Elevation Program (3DEP). The BAA provides detailed information on how to partner with the USGS and other Federal agencies to acquire high-quality 3D Elevation data.