Render wetland=saltmarsh with a fill color

[jeisenbe]

• Unlike most wetlands, wetland=saltmarsh has only a pattern with no fill
• This is the same situation as with wetland=mangrove and wetland=reedbed; all 3 features currently have no fill, because when we used land polygons the ocean and water fill colors were rendered below landcover, and these features can be found outside of the coastline or over water areas.
• There are issues for the two other features requesting a color fill rendering: Render reedbed with a non-transparent color #2013 and Render wetland=mangrove with dark green fill #2025
• This new issue is created so that all 3 features can have a color fill added, now that the oceans and water areas are rendered above landcover
• Now, if wetland=saltmarsh is drawn outside of the coastline it will continue to have a blue, ocean color fill; the fill color would only be seen when the feature is over land.
• It is suggested that wetland=saltmarsh could have the same color as wetland=marsh, or a similar color

[jeisenbe]

Test renderings - Delaware

Before: current rendering of saltmarsh without fill color

z14 Delaware seashore - saltmarsh at center (park and residential fill shows), wetland=marsh with fill on left

14 Salt marsh islands on right and upper left

z14 - Salt marsh on left, Dodd marsh on right is wetland=marsh

Test 1: Saltmarsh with @grass fill - #cdebb0

• same as wetland=marsh, wetland=fen and wetland=wet_meadow

z14 @grass - Delaware seashore - saltmarsh at center (park and residential fill shows), wetland=marsh with fill on left

z14 @grass - Salt marsh islands on right and upper left

z14 @grass - Salt marsh on left, Dodd marsh on right is wetland=marsh

Test 2: Saltmarsh with @campsite fill - #def6c0

z14 @campsite - Delaware seashore - saltmarsh at center (park and residential fill shows), wetland=marsh with fill on left

14 @campsite - Salt marsh islands on right and upper left

z14 @campsite - Salt marsh on left, Dodd marsh on right is wetland=marsh

[jeisenbe]

Zeeland, Netherlands saltmarshes

A. Large salt marsh with many large tidal channels
https://www.openstreetmap.org/#map=13/51.3590/4.1393

B. 2 small salt marshes: one over sea water, one over land in database
https://www.openstreetmap.org/#map=15/51.4552/3.6555

0) Before

A. z13

B. z15

1) Saltmarsh with @grass fill - #cdebb0

A. z13

B. z15

2) Saltmarsh with @campsite fill - #def6c0

A. z13

B. z15

[jeisenbe]

As @imagico suggested in #2025 here are test renderings of saltmarsh with @grass fill - #cdebb0 plus a dot pattern suggestive of saltwater.

0) Current rendering for comparison:

A. Salt marsh (left) and marsh (right)
https://www.openstreetmap.org/#map=13/51.3590/4.1393

B. Small salt marshes: one over sea water, one over land in database
https://www.openstreetmap.org/#map=15/51.4552/3.6555

C. Saltmarsh (left) next to marsh (center), mouth of the Eel river, California

1) Saltmarsh with dense dot pattern and @grass fill - #cdebb0

• This dot pattern is copied from the saltwater pattern in the alt-colors style (water_salt.svg), changed to white
• However, it may be too dense, covering up too much of the grass color

A.

B.

C.

2) Saltmarsh with looser dot pattern and @grass fill - #cdebb0

• This pattern uses slightly smaller dots, 5 pixels apart on average
  -From http://www.imagico.de/map/jsdotpattern.php#x,128,jdp68152;g,5,32,32;rx,25,2,32,32;rx,25,2,32,32;rx,25,2,32,32;rd,0,0,0,dot,0.125,10,9,0,jdp48264,ffffff,cdebb0;

A.

B.

C.

I believe this second pattern works well.

[jragusa]

Why not replacing blue lines by white lines or even a mix of both lines ?

[jeisenbe]

The same wetland pattern (with the blue horizontal lines and green vegetation symbols) is used over land and over water, so that pattern needs to match the other wetland pattern styles. We could use white dashes on the green fill pattern instead of dots, but I think that dots suggest salt more clearly than short lines.