Sure I can do that. I will see about creating a standalone DirectLayer Map
Legend example (code and some explanatory text). Is that what you had in mind?
Where would you see it being posted? That would help me understand what
content to create.
Hal
From: Jody Garnett [mailto:jody.garn...@gmail.com]
Sent: Thursday, November 27, 2014 3:29 PM
To: Hal Mirsky
Cc: Andy Turner; geotools geotools-gt2-users@lists. sourceforge. net
Subject: Re: [Geotools-gt2-users] Choropleth map legend
That would be a killer example for the docs Hal - are you in position to share
your code?
Jody Garnett
On Tue, Nov 25, 2014 at 2:22 PM, Hal Mirsky <hmir...@aseg.com> wrote:
Andy,
I derived a class from DirectLayer and implemented the draw method which
worked great.
Some of the legend text was dynamic (e.g. low/high values for each color).
A little interesting to figure out the size of rectangles I needed to draw
for each legend item. Here's a snippet:
private Font titlef = new Font("Ariel", Font.BOLD, 12);
private Font itemf = new Font("Ariel", Font.BOLD, 10);
Rectangle2D titleLabelRect = titlef.getStringBounds(title, new
FontRenderContext(null, RenderingHints.VALUE_TEXT_ANTIALIAS_DEFAULT,
RenderingHints.VALUE_FRACTIONALMETRICS_DEFAULT));
Rectangle2D itemLabelRect = itemf.getStringBounds(label, new
FontRenderContext(null, RenderingHints.VALUE_TEXT_ANTIALIAS_DEFAULT,
RenderingHints.VALUE_FRACTIONALMETRICS_DEFAULT));
// now get the height of the title rectangle and height to use for each
legend item:
th = (int) titleLabelRect.getHeight();
ih = (int) itemLabelRect.getHeight(); // height of site label. Also used
as icon size
...
Hope this helps,
Hal
-----Original Message-----
From: Andy Turner [mailto:a.g.d.tur...@leeds.ac.uk]
Sent: Tuesday, November 25, 2014 11:36 AM
To: geotools-gt2-users@lists.sourceforge.net
Subject: [Geotools-gt2-users] Choropleth map legend
Hi,
I would like to have a map legend for the choropleth maps I am generating,
please will you help?
To style the main part of the map I have followed an example using
ColorBrewer and FilterFactory2. I have a Classifier by calling evaluate on a
Function from the FilterFactory2.
I've have searched and found others asking about this [1], but no answers.
[1]
http://gis.stackexchange.com/questions/22962/create-a-color-scale-legend-for
<http://gis.stackexchange.com/questions/22962/create-a-color-scale-legend-for-choropleth-map-using-geotools-or-other-open-sou>
-choropleth-map-using-geotools-or-other-open-sou
Thanks,
Andy
http://www.geog.leeds.ac.uk/people/a.turner/index.html
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