Where do you get reliable data of elevation above sea level? Does UN keep record of it?
- busterwasmycatLv 72 weeks agoFavorite Answer
It is complicated because that information is collected at the nation level, and nations have different standards and applied different levels of effort to defining topography (actual mapping). There is even a bit of a discussion that we have to enter into just to talk about what "sea level" actually means. The standards are not identical among nations, although it is possible to convert from one set of standards (the geoid model employed and used as reference) to another, sometimes fairly easily and sometimes not.
The UN, if it were to have such a database, would simply provide data they got from the individual nations.
You can mostly access topographic information on-line fairly easily, although how easily and how precise the info will be does depend on the region of interest. there are both private (commercial) web sites and public (government) web sites that can be used to get this sort of info. Toporama in Canada (Natural Resources Canada web app) is pretty good for Canada, for example. USGS is a good starting place for the US.
Sort of depends on what you mean by "reliable". As reliable as anything unless you pay to have the surveys done yourself.
- Anonymous1 week ago
The only thing the UN keeps track of is their expense records.
- Anonymous2 weeks ago
Usually from topographic maps. I don't know that the UN keeps such data, but most countries' governments publish maps with this information. In the USA, it's the US Geological Survey that does this.
- JosephLv 72 weeks ago
In the US the United States Geological Survey makes surveys and publishes topographic maps that include elevations above sea level. The local governments, land surveyors and engineers then use the USGS data.
Other countries have agencies similar to the USGS.
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- derframLv 72 weeks ago
Aviation charts will give you accurate elevations of airports.