[mapserver-users] Layer with over 6000 shapefiles

Stephen Woodbridge woodbri at swoodbridge.com
Wed Jan 29 10:38:03 PST 2014


On 1/29/2014 1:27 PM, EVANS, JAMES R GS-13 USAF ACC 84 RADES/SCZE wrote:
> The Tile4ms utility is kicking out an error on some of the larger shape
> files, saying the .dbf doesn't match the file.  Whatever that means.  I can
> still load the "bad" shapefiles in Global Mapper, and they appear to be

This error means that the columns in the dbf files that you are adding 
to the tileindex do not all have the same attribute columns. This is 
caused by the columns being just different, in names, widths, or order 
of columns.

Mapserver opens the first file that it gets a hit on and then expects 
ALL other files to have identical DBF structures because of the way it 
access data in the files.

-Steve W

> correct.  I'm reprocessing the data now to cut down on the number of files.
> I should end up with a 48x16 grid covering the whole world.  Hopefully I can
> get that working with an index and speed things up when displaying this
> layer.
>
>
> -----Original Message-----
> From: mapserver-users-bounces at lists.osgeo.org
> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Stephen
> Woodbridge
> Sent: Wednesday, January 29, 2014 9:46 AM
> To: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] Layer with over 6000 shapefiles
>
> On 1/29/2014 11:37 AM, Jeff McKenna wrote:
>> On 1/29/2014, 12:32 PM, EVANS, JAMES R GS-13 USAF ACC 84 RADES/SCZE wrote:
>>> Hi,
>>> Is there a way to add a layer that points to 6000 some odd shapefiles?
> I've created a set of contour files for the whole world, and when I had the
> info in a single shapefile it was about 260GBs.  Mapserver would serve it
> up, but performance was horrible.  I now have the set broken up into about
> 6000 separate shapefiles, but don't know how to address that in a single
> layer.  I tried using gdaltindex, to create a single index file that points
> to all the other shapefiles, but I get an error saying the shapefiles are an
> unsupported type.  Is there some other way to create an index that Mapserver
> can use to point to this many shapefiles?
>>> Thanks,
>>> James
>>>
>>
>> You can use the MapServer "tile4ms" utility
>> (http://mapserver.org/utilities/tile4ms.html).  There are some good
>> examples on that page for you to follow.
>
> Check the results from tile4ms with shpdump and make sure that you dont have
> all null shapes. I have run into this on Ubuntu. I believe in both the
> packages and compiling for source. I haven't had time to run down what the
> issues are.
>
> -Steve
>
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