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2
votes
1answer
45 views

General terms for the Esri-terms “Layer” and “Feature Class”

I'm familiar with these terms used by ESRI: Layer Stores visual properties (color, symbols,…) does not store data (attributes, coordinates) links to a Feature Class (or raster data) Feature Class ...
17
votes
3answers
719 views

How much Water on Earth(USGS) : A Wrong Map representation?

I happened to read a USGS article, How much water is there on, in, and above the Earth? showing a representation of all the water(which includes water from Oceans, Seas,Bays,Ice caps, Glaciers, ...
11
votes
2answers
541 views

What is my distance when viewing a scaled-topographic map?

A close friend from my company asked me a question about a topographic scaled map (1:25.000) that what was the altitude to a location in km (as you are viewing Earth from space) when he was viewing ...