We’ve recently exported the latest data gathered by our app “Leaf Watch” into a Google Fusion table.  This enables you to map the data very easily and has shown us quite clearly the distribution of records.

I hesitate to say that it reflects the true distribution of the moth but it certainly gives us a pretty good idea.

The distribution of records also happens to match what we were expecting – a good spread of records across southern and central areas of the country but tailing off in the far west and north.

Map showing distribution of records received

Map showing distribution of records received

 

Another feature I like about the mapping in the Google Fusion Tables tool is the ability to display data as a heat map – therefore, to show not just the distribution of records but also their density.  Not surprisingly, the majority of records are from major centers of population in the south and central areas of the country.

Heat map showing geographical "density" of records received

Heat map showing geographical "density" of records received

 

A smaller scale view gives a slightly clearer picture:

Smaller scale version of the heat map showing geographical "density" of records received

Smaller scale version of the heat map

3 Responses to “Maps of Horse Chestnut Leaf Miner distribution”

  1. on 24 Aug 2011 at 7:05 pmGregory Marler

    This is just the distribution of records submitted?
    How easy is it to make a map of (average) damage rating?

  2. on 04 Sep 2011 at 8:34 amPaul Richardson

    This is very interesting. Will you keep it updated? I have been adding records, and it would be nice to seem them appearing. It would also be great to have a link through from the app itself to the results – just a hyperlink in the instructions would probably do it.

  3. on 21 Sep 2011 at 4:44 pmDave Kilbey

    Hi Paul

    A brand new website for the app (and the results you have collected) is coming soon – I’ll post about it nearer to it’s launch date (beginning of Oct). We’ll have some clearer and hopefully, interactive maps on a Results tab.

    Dave

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