6 replies to this topic

[rmcculley]

I've got a project where I need to symbolize three different attributes on line features.

It is a supporting figure in a long term road construction plan. For each road, I need to show:
- Surface type (6 different types)
- Traffic volumes counted (4 categories)
- Project priority (2 categories)

I haven't really put a lot of thought into it yet, so far I've tried something like this:

- Roads are symbolized as solid lines determining surface type:


- Traffic volumes shown as a highlight color behind the road, something like:

where the black lines would be the colour indicating surface type.

- Project priority shown as a dashed overlay. Non-priority lines get nothing. Something like:

where the black line would be the colour indication surface type.

It's seems a little busy/confusing. Any suggestions or examples about how to better symbolize something like this?

[Martin Gamache]

This may work:


 road_classes.gif   4.58K   208 downloads

[frax]

what else will you be showing in the map?

[Hans van der Maarel]

I agree with Martin, using the line width to display one attribute (traffic volume would be the most logical one here) will probabely make it easier to read.

[Martin Gamache]

One thing I didn't mention but whihc is obvious whgen looking at it again is that the casing option for the priority will affect the way the color on the inside stroke looks, especially with the example of the black casing that I used. There will need to be some care in choosing both your surface colors and the casing color. The color of the background of the map may also play havoc on your surface colors. All things to keep in mind.

[Nick Springer]

Martin's system works well, and his last comment about casign colors shouldn't be an issue since you only have 2 priority classes. You should be able to select 2 colors that work with the fill colors and the background.

[DaveB]

Martin's system works well, and his last comment about casign colors shouldn't be an issue since you only have 2 priority classes.  You should be able to select 2 colors that work with the fill colors and the background.

<{POST_SNAPBACK}>

I think you only need one color for priority. It's binary, so casing = priority is yes, no casing = priorty is no.