USGS Data Initiatives for Elevation, Streams and Topo Maps

Transcription

1 USGS Data Initiatives for Elevation, Streams and Topo Maps Gary Merrill, USGS Geospatial Liaison for Carolinas Silvia Terziotti, USGS Assoc. Geospatial Liaison for North Carolina, Water Communities of Use U.S. Department of the Interior U.S. Geological Survey

2 National Geospatial Program

3 National Enhanced Elevation Assessment was sponsored by the NDEP s member agencies and was completed in December of Purpose was: 1. To develop strategies to better meet national elevation data needs 2. Document national-level requirements for improved elevation data. 3. Estimate the benefits and costs of meeting those requirements. 4. Evaluate new, national-level elevation program models. Final Report (March 29, 2012) Study participants came from 34 Federal agencies (all 50 states), selected local government and Tribal offices, and private and Non-forprofit organizations. For purposes of surveys, there were 27 major Business Uses, five enhanced elevation data Quality Levels (QLs) and five update frequency levels included. 4

4 5 National Enhanced Elevation Top 10 Business Uses

5 7 National Enhanced Elevation Data Quality Levels

6 National Enhanced Elevation Approximate difference in resolution between LiDAR data quality levels 3, 2, and meter point spacing QL3 0.7 meter point spacing QL meter point spacing QL1 8

7 10 National Enhanced Elevation State LiDAR Programs

8 11 National Enhanced Elevation NED Currency by Year Acquired 80 Percent of elevation data are more than 30 years old (up to 88 years) and will not meet user requirements for many applications.

9 13 Reference Links NEEA Survey Analysis & and Final Report 3D Elevation Program (3DEP) NEEA at a Glance How to Obtain NED Data LiDAR Point Cloud Data Availability LiDAR Base Specification Version 1.0

10 National Geospatial Program

11 National Enhanced Elevation Assessment was sponsored by the NDEP s member agencies and was completed in December of Purpose was: 1. To develop strategies to better meet national elevation data needs 2. Document national-level requirements for improved elevation data. 3. Estimate the benefits and costs of meeting those requirements. 4. Evaluate new, national-level elevation program models. Final Report (March 29, 2012) Study participants came from 34 Federal agencies (all 50 states), selected local government and Tribal offices, and private and Non-forprofit organizations. For purposes of surveys, there were 27 major Business Uses, five enhanced elevation data Quality Levels (QLs) and five update frequency levels included. 15

12 16 National Enhanced Elevation Top 10 Business Uses

13 18 National Enhanced Elevation Data Quality Levels

14 National Enhanced Elevation Approximate difference in resolution between LiDAR data quality levels 3, 2, and meter point spacing QL3 0.7 meter point spacing QL meter point spacing QL1 19

15 21 National Enhanced Elevation State LiDAR Programs

16 22 National Enhanced Elevation NED Currency by Year Acquired 80 Percent of elevation data are more than 30 years old (up to 88 years) and will not meet user requirements for many applications.

17 24 Reference Links NEEA Survey Analysis & and Final Report 3D Elevation Program (3DEP) NEEA at a Glance How to Obtain NED Data LiDAR Point Cloud Data Availability LiDAR Base Specification Version 1.0

18 Questions? 25