Kde mohu najít shapefiles tvrdosti vody v USA?

Question

<\/HEAD>Chci najít shapefiles tvrdosti vody v USA. Hledal jsem je zde: <\/SPAN>https:\/\/www.epa.gov\/waterdata\/waters-geospatial-data-downloads<\/A> <\/SPAN>ale bez úspěchu. Existuje nějaký dobrý zdroj dat, odkud si mohu tyto hranice stáhnout?<\/DIV><\/DIV><\/BODY><\/HTML>

PeterKing · Answer

You may want to refine exactly what you mean by hardness. Hardness can mean different things to different audiences. Some may think of hardness as the literal dissolved calcium or magnesium definition or some think of hardness as all dissolved minerals in water, both surface and conveyed.

You may be able to create your own features from the simple USGS maps at the following locations.

Hardness in water, USGS Water Science School

USGS NAWQA: Quality of Water from Domestic Wells in the United States

Hope this helps.

Peter