Description Usage Arguments Details Value References Examples
isochrone_png
calls the walkalytics
isochrone API which calculates the walking isochrone for a source location
and returns a repsonse object that contains a base64-encoded raster as PNG file with classified isochrones.
1 2 | isochrone_png(x, y, epsg = 3857, max_min = 1000, break_values = c(0, 3, 6,
9, 13), key = "my_walkalytics_key")
|
x |
x-coordinate of the source location (coordinate system is WGS/84 Pseudo Mercator). |
y |
y-coordinate of the source location (coordinate system is WGS/84 Pseudo Mercator). |
epsg |
EPSG code for coordinate system of the x- and y-coordinate. |
max_min |
integer. Maximum number of minutes for the isochrone. |
break_values |
a vector of break values (walking time in minutes) for the classification of the PNG result. |
key |
your |
To get an API key, you need to register at https://dev.walkalytics.com/signin. With the free starter account, you can make up to 100 calls a week to the API.
The response object from the request. Use save_png to save the base64-encoded PNG to file.
Walkalytics API documentations
1 | isochrone_png(x = 895815, y = 6004839, key = "abcd1234")
|
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