TypeError: Cannot read property 'setCenter' of null

[dryan]

https://sentry.ragtag.org/ragtag/nomad-prod/issues/122/

TypeError: Cannot read property 'setCenter' of null
  at None (/carpools/bc1101a6-a7a1-41a2-b10a-2e495d133255/edit:302:13)

[dryan]

Looks like the call to map.setCenter can be invoked before the map is initialized. Also the map variable is set as a global variable. If that's the intention, do it explicitly with window.map =. Though I don't see why we need it to be global.