[OpenLayers-Users] World user map

[Paul Meems (Top-X)]

Thanks to the suggestion made by Barend Köbben I found this post
http://thematicmapping.org/playground/openlayers_propsymbols_geojson.phpwhich
was showing what I need.

I've altered the example and it is now running at
http://www.mapwindow.org/conference/2012/usermap.html

But when I put the code (not that much) in the webpage with the
participants I get horizontal transparent 'lines' in my OSM base map.
Because my div has a gray background the lines are gray as well.
This is probably some CSS issue, but I haven't figured it out.
http://www.mapwindow.org/conference/2012/participants.php

Thanks all for your help and if you have a suggestion of the fix the lines
let me know.

Paul
--
Project manager Open Source GIS Conference 2012



2012/5/15 Barend Köbben <kobben at itc.nl>

> Hi Paul,
>
> For such a relatively simple map I would probably not even use a WxS, just
> a geojson file of a simple world map and javascript to read the attributes
> of how many visitors per country. You could probably use OpenLayers for
> that (which I did not try myself), but other solutions too, see e.g the
> example of a simple thematic maps made with the D3 library at
> http://kartoweb.itc.nl/kobben/test/buurten.html
>
> BTW, you should of course not use a map where you color countries if a
> person comes from there (a so-called choropleth or chorochromatic map).
> That would greatly misdirect the user into thinking many people come from
> e.g. Russia, because he sees a huge red polygon, while none seem to come
> from Luxemburg (which he won't see at al at that scale). In reality maybe
> 20 are from Luxemburg and only 1 from Russia. Better use proportional
> point symbols per country, see ge, the map "AANT_INW" in the example
> mentioned above...
>
> Barend
>
> --
> Barend Köbben
> Senior Lecturer, ITC - University of Twente,
> Faculty of Geo-Information Science and Earth Observation
> PO Box 217, 7500AE Enschede (The Netherlands)
> +31-(0)53 4874 253
>
>
>
>
> On 14-05-12 22:34, "Paul Meems" <bontepaarden at gmail.com> wrote:
>
> >
> >
> >
> >Hi,
> >
> >I'm working on a kind of user map.
> >It should be a map with all the countries of the world and the countries
> >are colored if someone from that country is coming to the Open Source GIS
> >conference.
> >I also need a label with the name of the country and the number of people.
> >
> >I have some experience with OL together with GeoServer and PostGIS, but
> >for this web page I can't use that.
> >
> >I think I need a WFS server that has the countries of the world and then
> >use a GML file with my data to create the labels and color the countries,
> >am I right?
> >
> >I'm already stuck at the first step. Is a public WFS server available
> >that I can use to do this?
> >
> >I've already made a static image of what I want, but I would rather use
> >OL.
> >Can anybody advise me on this?
> >
> >Here are my static images:
> >http://www.mapwindow.org/conference/2012/participants.php
> ><http://www.mapwindow.org/conference/2012/participants.php>
> >
> >Thanks,
> >
> >Paul
> >--
> >Project manager Open Source GIS Conference 2012
>
>
> Faculty of Geo-Information Science and Earth Observation (ITC)
> University of Twente
> Chamber of Commerce: 501305360000
>
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