[mapserver-users] LAYER example for kernerdensity wanted

[Jeff McKenna]

On 2014-09-27 4:51 PM, Rahkonen Jukka (Tike) wrote:
> Hi,
>
> I am running MapServer version 6.5-dev on Windows and I suppose it has the support for kerneldensity layers. Could someone show the LAYER part that works with the Natural Earth populated places dataset http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_populated_places.zip? I have created .qix index but not touched the data in other ways.
>
> I have indeed managed to get some coloured stripes out at some scales but what I mostly get is Internal server error (http 500). MS_ERRORFILE does not show any errors and Apache error log is probably recording just this:
> [Sat Sep 27 21:57:27 2014] [error] [client 127.0.0.1] Premature end of script headers: mapserv.exe
>
> My current LAYER (or layers, one for data and one for kerneldensity):
>
> LAYER
> NAME "points"
> DATA "c:\data\ne\ne_10m_populated_places"
> TYPE POINT
>      STATUS ON
>      PROJECTION
>          "init=epsg:4326"
>      END
>      debug 5
>      CLASS
>         STYLE
>                     SIZE 5
>                     SYMBOL "circle"
>                     COLOR 200 200 200
>                     OUTLINECOLOR 0 0 0
>          END
>      END
> END
> layer
>      name "heatmap"
>      type raster
>      connectiontype kerneldensity
>      connection "points"
>      status on
>      debug 5
>      #processing "RANGE_COLORSPACE=HSL"
>      processing "KERNELDENSITY_RADIUS=20"
>      processing "KERNELDENSITY_ATTRIBUTE=RANK_MIN"
>      #processing "KERNELDENSITY_COMPUTE_BORDERS=ON"
>      processing "KERNELDENSITY_NORMALIZATION=AUTO"
>      offsite 0 0 0
>      class
>        style
>          COLORRANGE  "#0000ff00"  "#0000ffff"
>          DATARANGE 0 32
>        end
>        style
>          COLORRANGE  "#0000ffff"  "#ff0000ff"
>          DATARANGE 32 255
>        end
>      end
>    end
>
> What I have tried so far has been to comment out this and that but result seems to be always the same.
>
> -Jukka Rahkonen-

Hi Jukka,

The good news/bad news is that I can reproduce this same issue on 
Windows, with MapServer-master and GDAL (both trunk and 1.11.1 release). 
  I have built both MapServer and GDAL in debug mode, and have placed 
the debug messages (and test case) in a ticket at 
https://github.com/mapserver/mapserver/issues/5019  It seems to crash on 
a memcpy call by GDAL, hmmm...


-jeff

-- 
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/