Hi Hernan,
Thanks for your answer. I got an error which says "Error: Reading a
number failed: a digit between 0 and 9 expected" and "element" of your
example is selected. I think that I'm not understanding well how to
connect the downloaded file (in fact I have not downloaded anything) to
the part where you render the svg and I don't see anything in your
example which links them. Whats the thing I'm missing?
Thanks for your help. Hopefully, tomorrow we can show maps for new
territories in Roassal.
Cheers,
Offray
El 21/11/14 a las #4, Hernán Morales Durand escribió:
2014-11-18 10:30 GMT-03:00 Offray Vladimir Luna Cárdenas <off...@riseup.net
<mailto:off...@riseup.net>>:
Hi,
This Thursday and Saturday we will have a small workshop on data
storytelling and I would like to present Pharo/Roassal to the people there
as a tool for creating and sharing visualizations.
My idea is to use Playgrounds to make agile visualization and then share
them using cloud sharing at stfx and etherpads.
The maps I would like to make are similar to the ones that have colored
countries [1][2], but using internal country geopolitical divisions. For
the
case of Colombia I would like to use the ones of [3], specifically
something
like [4] and use the same syntax of RTMetricMap inside the country.
[1] http://bit.ly/1yiedrE
[2] http://bit.ly/1xTAQV0
[3] https://commons.wikimedia.org/__wiki/User:Shadowxfox/Maps#__Colombia
<https://commons.wikimedia.org/wiki/User:Shadowxfox/Maps#Colombia>
[4]
https://commons.wikimedia.org/__wiki/File:Colombia___departamentos_otros.svg
<https://commons.wikimedia.org/wiki/File:Colombia_departamentos_otros.svg>
So my question is:
- There is any way to upload this SGV maps and treat them as the maps
already in RTMetricMap, telling the names of the internal geopolitical
divisions inside a Country and how to color them according to a value and
make them zoomable?
- Where can I start to look to support this feature?
SVG is basically XML, so you can parse it like this:
| xmlTree |
xmlTree := (XMLDOMParser parseFileNamed: 'Argentina.svg') firstNode.
xmlTree
The coordinates of a map are in the SVG path description, and you can add them
separately. For example if you download this file
http://commons.wikimedia.org/wiki/File:USA_Counties_with_FIPS_and_names.svg and
take the node with "Ulster, NY" you can render it this way:
| view svg |
view := RTView new.
svg := (RTSVGPath new
path: 'M 501.96598,97.8 L 502.15198,100.009 L 502.68298,101.739 L
502.88598,102.153 L 503.20498,104.028 L 502.29498,104.366 L 501.61098,104.502 L
501.02498,104.483 L 500.32998,104.231 L 499.33398,104.921 L 498.91498,104.299 L
497.86898,103.844 L 496.94598,103.415 L 497.13498,102.933 L 497.50398,102.086 L
497.69798,101.505 L 495.56698,100.824 L 494.24598,100.423 L 496.85998,97.791 L
498.36098,98.174 L 499.08798,98.084 L 500.56998,97.894 L 500.65098,96.89 L
501.06998,96.754 L 501.99798,97.146 L 501.96598,97.8';
fillColor: (Color r: 0.612 g: 0.488 b: 0.3 alpha: 1.0);
scale: 5)
element.http://commons.wikimedia.org/wiki/File:USA_Counties_with_FIPS_and_names.svg
view add: svg.
view open
There should be an easier way like using an SVG importer for Roassal, but that's
all I have for now.
Cheers,
Hernán
