[mapguide-users] Watermarking a Map

[Jackie C. Ng]

Perhaps have your watermark as a transparent png, and programmatically insert
an img DOM element on of the div that contains the map image when the map
has loaded?

- Jackie


Crispin @ 1Spatial wrote:
> 
> Hi all you clever folk,
> 
> Here is Fridays problem - Watermarking a map.  Not in Fusion, just on a
> basic layout.
> A common situation is to have to add either a copyright notice or other
> watermarking/branding to mapping.
> Within the MapGuide environment I have come up with some options -
> discussion and suggestions welcome...
> 
>  1) Open all the raster imagery and watermark it!  Bit brutal and also
> does not account for different scales of mapping based on the same source
> or provide ability to always put a copyright notice down in one corner.
> 
>  2) Use a low-level WWW service (IIS on Windows) process to intercept the
> image and edit before sending it out.  This is "easy" on IIS7/Win2008
> apparently due to a new API but I can't get it to happen on lower versions
> properly - I watermark the top of the image and truncate the rest.  Plus
> this is a Windows only solution could do better:
> 
>  3) Add an additional tiled-layer of a standard image overlay.  Create a
> complete tile-cache and then replace every tile in the cache with a
> transparent watermark image and have that as an overlay to both vector and
> raster data.  Can you seed a tile cache tree.  This has the advantage that
> is would work for vector as well as raster data but is a bit of a
> sledgehammer and also cannot put a notice just on one corner of the map.
> 
>  4) Edit the .templ files to include an additional   layer that is turned
> on and off somehow according to scale.  The   would need to be on top of
> the map and possibly mess up the mouse interaction but has lots of
> inherent advantages in positioning, style, network and server efficiency.
> 
>  5) Add to the MapGuide server functionality the ability to have a
> scale-dependant overlay image 'layer'.  This layer, defined by a static
> image could be cantered, stretched, tiled, or placed in one of the four
> corners of the map.  This is then built into the final image rendered by
> the server and is almost essential functionality IMHO.
> 
> 


-----
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http://www.linkedin.com/in/jackieng
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