6,764 reputation
244133
bio website djq.me
location Dublin, Ireland
age
visits member for 3 years, 10 months
seen Jul 21 at 21:59

interested in postgis, geodjango, qgis, python, R and LaTeX.

twitter: @djq


Dec
20
comment Effectively displaying demographic data on a printed map
@whuber I agree. I did not make the distinction in my question when I wrote it first as I had not thought about it clearly until I read your comment.
Dec
20
comment Effectively displaying demographic data on a printed map
@whuber - I think it's probably done using flash (sadly!).
Dec
20
comment Effectively displaying demographic data on a printed map
@whuber I understand the differences between the measures, however do you think that visually displaying number of people per area (as dots on a map for example) is essentially very similar to population density? I think showing densities, and absolute counts is probably confusing. ps. thanks for the tip on choro/chloro - I never noticed before!
Dec
20
comment Effectively displaying demographic data on a printed map
@Raj - yes I got it, thanks; @dassouki if you want it, send me an email (in profile)
Dec
20
comment Effectively displaying demographic data on a printed map
@Raj, sorry, I meant @dassouki to email me, so I could send it to him. But if you've already done it, great!
Dec
20
comment Effectively displaying demographic data on a printed map
try emailing me?
Dec
20
comment Effectively displaying demographic data on a printed map
@dassouki - I agree that is usually the case. Perhaps you could use a variable that does not have a huge range for this (average age?), or if it does, you could logarithmically transform it.
Dec
20
comment Effectively displaying demographic data on a printed map
How large are the zones relative to the page size? Can you fit a small plot in each zone? (e.g. a radar chart)
Dec
14
comment Data organization strategies for .csv and .shp
It's a once off issue of organizing the data - the csv files will not be update. The relationship between the data is one to one.
Dec
11
comment Using a web map to identify and access data
Wonderful - thank you.
Dec
11
comment Using a web map to identify and access data
@Peter: how does a spatial index work in general, and for something like this? This is the type of issue I am hoping to learn about as I've never made a large database like this before (and realize it is ambitious).
Dec
11
comment Using a web map to identify and access data
I am considering Fusion Tables, but I would prefer to store the data in a way that I do not have to make it all public due to some copyright issues.
Dec
11
comment Using a web map to identify and access data
Thanks Peter, that is exactly what I am planning on doing. However, I'm not sure whether it is reasonable to do this for large areas and wonder if there are any good programming strategies to implement this.
Dec
11
comment Using a web map to identify and access data
I meant to say that the resultant data is not spatial (just a number) but it is associated with a spatial area. I suppose it's the same as getting a value from an attribute table of a spatial object.
Dec
10
comment How do I build a form within ArcMap?
Do you want users to add spatial data too? Or is it just fields associated with features?
Dec
9
comment Find bounding box of a Google map
Thank you - yes that is it exactly. I must have missed it!
Dec
8
comment Most common unmet GIS need for businesses
@Dan S. & @whuber - that looks, interesting though it's quite high-level. I am more interested in grass-roots training to share the skills (training individuals, or training trainers), rather than codeing something mindblowing! Both are necessary, but my skills lie more in lower-tech problems.
Dec
8
comment Plotting KML files onto a Google Map
And I deleted the part about re-projection as I just realized it was irrelevant after reading Mapperz's comment.
Dec
8
comment Plotting KML files onto a Google Map
@ radek The google documentation says Google Earth uses WGS84 earth.google.com/support/bin/answer.py?hl=en&answer=148112 I didn't realize google maps was different (I updated my answer).
Dec
5
comment Problem with setValue() function in ArcGIS 10
Thank you - that worked perfectly.