National Map Viewer: Difference between revisions
From charlesreid1
(Created page with "=Shapefiles= ==Getting Shapefile Data== To download elevation data in shapefile format: Zoom into the area you want Check "US Topo" and click Find Products Next to each i...") |
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Download the shapefile data and unzip it | Download the shapefile data and unzip it | ||
== | ==Shapefiles to GeoJSON== | ||
We'll convert these shapefiles to something better for the web: GeoJSON | We'll convert these shapefiles to something better for the web: GeoJSON | ||
Revision as of 10:02, 28 July 2016
Shapefiles
Getting Shapefile Data
To download elevation data in shapefile format:
Zoom into the area you want
Check "US Topo" and click Find Products
Next to each item, there are four links - the third one is "Download"
Download the shapefile data and unzip it
Shapefiles to GeoJSON
We'll convert these shapefiles to something better for the web: GeoJSON
See http://ben.balter.com/2013/06/26/how-to-convert-shapefiles-to-geojson-for-use-on-github/
Install homebrew, then:
brew install gdal
This will install a utility called ogr2ogr, which we'll use to convert shapefiles to GeoJSON files.