What is relief in the context of elevation data? What are spot heights?

Elevation Data for Minnesota · Lidar: Current technology for collecting high resolution elevation data · Raster Data/Shaded Relief: Sources of grid cell data, ... Jun 3, 2011 ... A team of scientists has developed data and created maps of the world's rivers that provide the research community with more reliable information. As part of New Jersey's statewide GIS coordination program, LiDAR data collections and derived elevation products are available for download. Mar 27, 2025 ... It is important to remember that elevation data from all sources (barometric altimeters, GPS signals, and databases) is subject to error and ... Use the Lidar Finder to search lidar-derived elevation data by map, or select from all acquisitions in the data catalog table below. Lidar Finder. Vermont ... The elevation data index · Auto-Correlated DEMs · Lidar elevation data · USGS 3DEP elevation products · Utah Contours 500 Foot · Utah Contours Generalized 200 ... Jan 21, 2025 ... ... elevation information, the flood insurance rating engine may return a lower annual premium. FEMA's system compares the original elevation data ... For devices without a barometric altimeter, GPS data provides a basis for elevation. Determining accurate elevation data is complex. So that derived elevation ... Oct 2, 2024 ... Comments Section ... This answer depends on the type of elevation data you require. If you just need basic, mostly global, coverage there is the ... Reservoir Data: Streambed Elevation: 505.00 feet. Top of Dam Elevation: 670.00 feet. Project has seasonal conservation pool.