Hi,
sorry for the answer delay. VRT was exactly what I needed. Everything
works fine now!!
Thank you!
On 11/10/2010 05:10 PM, Dane Springmeyer wrote:
Hi Jaume,
You might be able to combine two gdal layers without blending by using a GDAL
VRT file:
http://www.gdal.org/gdal_vrttut.html
The idea would be to point Mapnik then at that single VRT.
Beyond that seeing a visual example of the output you are looking for might be
a good next step.
Dane
On Nov 10, 2010, at 6:06 AM, Jaume Figueras i Jové wrote:
Hi all,
I'm beginning to use mapnik and I'm trying to draw a map using mapnik with
different logical layers:
Base: vector layer (A) with land information
Layer (B) with imaginery in GeoTIFF
Layer (C) with other images in GeoTIFF
Top: vector layer (D) with road information
I'm using blending in the style with layers B& C, so
A -> grain_merge B -> hard_light C
<Style name="rasterB">
<Rule>
<RasterSymbolizer>
<CssParameter name="scaling">bilinear</CssParameter>
<CssParameter name="mode">grain_merge</CssParameter>
</RasterSymbolizer>
</Rule>
</Style>
<Style name="rasterC">
<Rule>
<RasterSymbolizer>
<CssParameter name="scaling">bilinear</CssParameter>
<CssParameter name="mode">hard_light</CssParameter>
</RasterSymbolizer>
</Rule>
</Style>
Layer B is composed of different images so I define different layers, one for
each image as:
<Layer name="B_img01">
<StyleName>rasterB</StyleName>
<Datasource>
<Parameter name="type">gdal</Parameter>
<Parameter name="file">img1.tiff</Parameter>
</Datasource>
</Layer>
<Layer name="B_img02">
<StyleName>rasterB</StyleName>
<Datasource>
<Parameter name="type">gdal</Parameter>
<Parameter name="file">img2.tiff</Parameter>
</Datasource>
</Layer>
The problem is that, as defined in the style, when img1 and img2 overlap they
are blended, but what i would like to do is first combine the img1 and img2
with no blending and then blend the result. Is there any way to do this in
mapnik or I need to GIMP the overlapping images first?
TIA.
--
Jaume Figueras i Jové
Ubuntu User #14347 - Linux User #504317
Universitat Politècnica de Catalunya
Departament d'ESAII
Edifici TR11
Rambla Sant Nebridi, 10
08222 TERRASSA
Telf: +34937398621 (intern UPC: 98621)
Mòbil: +34650756456 (intern UPC: 44785)
Fax: +34937398628 (intern UPC: 98628)
Centre de Simulació i Optimització de Processos Logístics (LogiSim)
http://logisim.fib.upc.es
Enginyeria de Sistemes, Automàtica i Informàtica Industrial (ESAII)
http://webesaii.upc.es
Universitat Politècnica de Cataluyna
http://www.upc.edu
_______________________________________________
Mapnik-users mailing list
[email protected]
https://lists.berlios.de/mailman/listinfo/mapnik-users
--
Jaume Figueras i Jové
Ubuntu User #14347 - Linux User #504317
Universitat Politècnica de Catalunya
Departament d'ESAII
Edifici TR11
Rambla Sant Nebridi, 10
08222 TERRASSA
Telf: +34937398621 (intern UPC: 98621)
Mòbil: +34650756456 (intern UPC: 44785)
Fax: +34937398628 (intern UPC: 98628)
Centre de Simulació i Optimització de Processos Logístics (LogiSim)
http://logisim.fib.upc.es
Enginyeria de Sistemes, Automàtica i Informàtica Industrial (ESAII)
http://webesaii.upc.es
Universitat Politècnica de Cataluyna
http://www.upc.edu
_______________________________________________
Mapnik-users mailing list
[email protected]
https://lists.berlios.de/mailman/listinfo/mapnik-users
