# Gradient for a stroke in Arcmap

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### #1 araki5 Posted 29 November 2006 - 10:27 AM

araki5

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I have an example I'm uploading of a map that was done for a report for Sacramento County California. I am trying to figure out a way to make a stroke line of a polygon in Arcmap on the INSIDE of the polygon ONLY.

I'm interested in the middle polygon representing the "POU within Zone 40". This is a neat trick and I want to emulate it.

If there is a way to do this in AI, I'm all ears(but I'm still a novice on AI).

Randy Long
Mackay and Somps

Raster is Faster, but Vector is Corrector.

### #2 Nick Springer Posted 29 November 2006 - 11:11 AM

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There is a section on the posting screen called "File Attachements"

Nick Springer

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### #3 David T Posted 29 November 2006 - 11:17 AM

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I have an example I'm uploading of a map that was done for a report for Sacramento County California. I am trying to figure out a way to make a stroke line of a polygon in Arcmap on the INSIDE of the polygon ONLY.

Without seeing the example, I *think* I know what you're trying to do.

Are you trying to do something similar to a 'coastal gradient'? Where you have the coastline fade from one color to another, gradually?

If so, that's pretty easy to accomplish. Just use the buffer wizard to create a series of polygons from your initial polygon. Then gradient all the polygons.

If that's what you're trying to accomplish, I'll look for my step-by-step directions, and post those.
David Toney, GISP
GIS Manager
United States Marine Corps
West Coast Installations

### #4 araki5 Posted 29 November 2006 - 01:08 PM

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that would be great. if it's like the "multiple ring buffer" I think I know where you're headed. if you got your directions, that would be helpful.
thx.

Nick,
I'm on the posting screen, and I can't seem to find "File Attachments".
Randy Long
Mackay and Somps

Raster is Faster, but Vector is Corrector.

### #5 benbakelaar Posted 29 November 2006 - 02:26 PM

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On the Post/Add Reply screen, the boxes are in the following order:

poll options
text box with clickable smilies
post options
file attachments
after posting
post icons

### #6 araki5 Posted 29 November 2006 - 03:52 PM

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On the Post/Add Reply screen, the boxes are in the following order:

poll options
text box with clickable smilies
post options
file attachments
after posting
post icons

ok, still looking, but no "file attachments"
Randy Long
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Raster is Faster, but Vector is Corrector.

### #7 benbakelaar Posted 29 November 2006 - 04:04 PM

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It should look like this attachment.

### #8 David T Posted 29 November 2006 - 05:23 PM

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Multiple Ring Buffers is on target, too. Here are the instructions I have. These are specific to ArcGIS 8.3 (as that's what we run). They are similar in 9.x, but the Buffer Wizard is part of ArcToolbox.

1. Load the polygon you are interested in.
2. Run Buffer Wizard
3. Select 'As multiple buffer rings'. Select the appropriate number of rings (i.e., 100 rings) and the distance between the rings (i.e., 50 meters). Hit 'Next'.
4. Select the appropriate type of buffer (inside only, outside only, etc). Since I do this for a coastal vingette effect, and use my Pacific Ocean polygon, I select inside only.
5. Open the Symbology tab. Change to 'Quantities', and select 'Graduated Colors'.
6. Select the first value, and change the symbol to the appropriate color you want to fade to (in my example, it's ocean blue).
7. Select the very last value, and change the symbol to white (or another appropriate color).
8. Now, select the top color, hold down the CTRL key, select the bottom color, right click, select 'Ramp Colors'.

That should be the effect you're looking for. Good luck!
David Toney, GISP
GIS Manager
United States Marine Corps
West Coast Installations

### #9 araki5 Posted 01 December 2006 - 11:59 AM

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this is what i was looking for. yeah, i forgot about the mult-ring buffer tool. i just want this one to look REALLY good.

i am still wondering why i can't upload any attachments.
Randy Long
Mackay and Somps

Raster is Faster, but Vector is Corrector.

### #10 David T Posted 01 December 2006 - 07:04 PM

David T

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this is what i was looking for. yeah, i forgot about the mult-ring buffer tool. i just want this one to look REALLY good.

i am still wondering why i can't upload any attachments.

Let us know how it turns out. I played with the amount of buffers a few times, until I found something that worked well.
David Toney, GISP
GIS Manager
United States Marine Corps
West Coast Installations

### #11 frax Posted 03 December 2006 - 03:52 PM

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This is very easy to do Illy - outer glow or play with strokes (which you can have multiple of, and you can have inside/outside or center (default))

In Arc - another way to do this, if you want to have a smooth gradient, is to do a distance grid. Or three - to create an RGB image (3 8-bit grids, that is).
Hugo Ahlenius
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