Sorry, I forgot to mention that I am using FireFox, and it is still
broken in that. EI loads ok.
-Steve
Ben Loh wrote:
Hi Stephen,
Thanks for the note.
Ack. How's that for an inauspicious debut...
That's what I get for adding a last minute shortcut. It ought to work now.
In general, your load time ought to be less than 2 seconds. Our
server's connection also isn't quite optimized yet (it's sitting in an
office right now), so load times might also vary depending on other
traffic.
I apologize for the inconvenience.
B
At 1:52 p -0400 9/12/06, Stephen Woodbridge wrote:
Hi Ben,
I get a javascript error:
doctopicsEl has no properties gishistory.js (line 113)
And the Loading...111.109 message continues far longer than I was
willing to wait. How far does it have to get on the initial load?
-Steve
Ben Loh wrote:
Hi folks,
I just thought I'd share our new web site prototype for exploring
historical census data intended for high school and college students.
Obviously, it's based on mapserver. We're using php-mapscript with
AJAX for the interface. I'd be very interested in any input that any
of you have, as we're not GIS pros.
The main url: <http://www.gisforhistory.org/>
A direct link to a map:
<http://www.gisforhistory.org/projects/greatmigration/?defaultView=map>
A few highlights:
* We're using historically accurate county maps from NHGIS along with
historical US census data from 1790 through 1970, and a few layers
that we constructed ourselves. (One big issue we have right now is
that we aren't using simplified shape files for the counties, so the
load time is rather slow. My guess is that we can cut down the load
time by about half with simpler shapes.).
* To help students keep track of what they're doing, we implemented a
"Query History" that records each click/setting they make ala
Photoshop's history feature.
* You can pan ala google maps by dragging the map. (We're still
troubleshooting a problem with Win IE where if you have the
"Temporary Internet Files" setting set to "Every visit to the page"
we run into caching issues while dragging).
* We're using AJAX to try to minimize bandwidth issues, as many
schools have a narrow pipe. (We're still trying to optimize loading.
The legend is generated dynamically via javascript and css to
minimize the number of files that need to be downloaded from the
server with any single call).
* The site is intended for novices, so it is deliberately simple.
We'd love to hear any suggestions or rants!
Thanks,
Ben
