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Where can I get Digital Elevation data for the US?
Digital elevation data for the United States and its territories are available through The National Map Downloader . Click the “Help” link at the top of the page for detailed instructions on how to find and download data. There is a separate site for The National Map Services . The 3D Elevation Program (3DEP) products and services available…
Which is the most accurate global elevation model?
The ASTER Global Digital Elevation Model Version 3 (GDEM v3) was evaluated over the conterminous United States in a manner similar to the validation conducted for the original GDEM Version 1 (v1) in 2009 and GDEM Version 2 (v2) in 2011. The absolute vertical accuracy of GDEM v3 was calculated by comparison with more than 23,000 independent…
What makes a database a hero in the office?
Not all end users are power users (i.e. know how to write SQL). Having the data already stored in a format that they can bring into Excel (or other similar tool) with minimal effort will make you a hero in the office. If the users cannot access or manipulate the data easily, they will not use your system.
How big is the 5 minute weather data?
The 5 minute data is about 2 TB in size and I have weather data going back 50 years at an hourly level by location. So let me answer you questions based on my experience: Don’t use NoSQL for this. The data is highly structured and fits a relational database perfectly.
What are the different types of elevation datasets?
The 3D Elevation Program (3DEP) products and services available through The National Map consist of standard digital elevation models (DEMs) at various horizontal resolutions, and elevation source (lidar) and associated datasets. In 2020, Digital Elevation Models were migrated to a new data delivery format called Cloud Optimized Geotiff.
Where can I find elevation data for UK?
The Environment Agency has released its LiDAR data on an open source license. It covers about 72% of England and Wales: https://environmentagency.blog.gov.uk/2015/06/16/free-mapping-data-will-elevate-flood-risk-knowledge/ This elevation finder is very good.
Where can I find seamless elevation data for the United States?
This specification documents the requirements and standards used to produce the seamless elevation layers for The National Map of the United States. Seamless elevation data are available for the conterminous United States, Hawaii, Alaska, and the U.S. territories, in three different resolutions—1/3-arc-second, 1-arc-second, and 2-arc-second.