Friday, April 30, 2010

Google Gadget for creating charts on Singapore's OneMap

The Singapore Land Authority (SLA) launched an alternative to Google Maps recently - called OneMap. It's built on ESRI's ArcGIS server and it comes with its OneMap Javascript API, which is essentially a wrapper around ESRI's API. This gives me a chance to work with ESRI's Javascript API and I decided to port the Charting Google Mapplet I wrote earlier to OneMap. The figure below is a screen shot of the gadget running in iGoogle's expanded Canvas mode.
This gadget will create pie charts on Singapore's OneMap from text files formatted as comma separated values (CSV). The CSV data must have a header row, SVY21 easting and northing columns to point to the locations to place the charts on. The charts created can be clicked on to show the values. 

For IE8 users, please run in IE7 or IE8 compatibility mode as IE8 breaks OneMap.The figure below shows the problem of OneMap with Internet Explorer 8 on iGoogle. I am not able to determine the source of the problem but you can click IE's Page button and choose Compatibility View Settings to turn add google.com to the Compatibility View websties .


 To run this gadget, click this link http://www.google.com/ig/adde?moduleurl=http://dominoc925-pages.appspot.com/gadgets/chart_onemap_ig.xml&source=imag.


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