Update README.md

README.md

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 # Atlas
 
-https://atlas.p3k.io/
+Atlas is a set of APIs to look up information about locations.
+
+## Timezone
+
+Retrieving the timezone at a lat/lng
+
+* `/api/timezone?latitude=45.5118&longitude=-122.6433`
+* `/api/timezone?airport=PDX`
+
+## Geocoder
+
+Retrieving the lat/lng for a named location
+
+* `/api/geocode?input=309+SW+6th+Ave,+Portland,+OR`
+
+Retrieving a named location from a lat/lng
+
+* `/api/geocode?latitude=45.5118&longitude=-122.6433`
+* `/api/geocode?latitude=45.5118&longitude=-122.6433&date=2016-07-012T09:00:00Z` and return the local time of the given timestamp
+
+## Weather
+
+Retrieving the current weather for a lat/lng
+
+* `/api/weather?latitude=45.5118&longitude=-122.6433&apikey=XXX`
+
+You'll need to pass an OpenWeatherMap.org API key in the request. Icon names reference the [weather-icons](https://erikflowers.github.io/weather-icons/) icon font.
+
+## Static Maps
+
+* `/map/img?marker[]=lat:45.5165;lng:-122.6764;icon:small-blue-cutout&basemap=gray&width=600&height=240&zoom=14`
+
+[Full Static Maps Docs](https://atlas.p3k.io/static-maps)
+
 
 
 ## License