Time series analysis of geometry data collected by phone
Channel: Neil Penman
Date: 2014-01-12

Release 13.12 of Smap adds the ability to do time series analysis on the server.  You can select any date from the survey to be your time axis and then show another question from the survey in a graph, map or table along that time axis.

In this video the collected data includes shapes, that is polygons.  A server side calculate function is added to the survey to compute the area of each of these polygons after the data is loaded.  The video then shows how changes in these areas over time can be shown on a map and graph.  The map is then exported as a report so that it can be shared by the speed evidence portal, email, Facebook or twitter.

Smap is an open source data collection tool for collecting data via mobile phones.  It supports fieldTask or odkCollect on Android devices as well as HTML5 browsers using Enketo. Further information can be found at http://blog.smap.com.au