How to create tiles accurately with MapServer?

[Manfred Meier]

Hello,

some month ago the was a mail from Thomas Hammerlund. He sent the 
screenshots, which I append here. Perhaps this is the same problem. I 
don't know if this problem was solved. Perhaps he knows an answer.

Greetings
Manfred


Stephen Woodbridge schrieb:
> Teemu Mäkelä wrote:
> 
>>
>> Hi,
>>
>> I should create tiles. I have linear features and in mapfile I've 
>> defined the line to be drawn with width of 1 pixel.
>>
>> On the border of tiles:
>> CASE A:
>> - Line continues OK from tile A to tile B, if line crosses the tile 
>> border with angle of 45-90 degrees.
>> CASE B:
>> - Line does not continue (small gap), if line crosses the tile border 
>> with angle of 0-45 degrees. Gap is the problem! Size of the gap 
>> depends on the angle. If angle is 5 degress, gap is about 10 pixels; 
>> if angle is 30 degrees, gap is about 3 pixels.
>>
>> Any idea how to get rid of the gaps on lines?
>>
>> Teemu
> 
> 
> Hi Teemu,
> 
> I think we will need more info to help. Can you post your mapfile 
> please. Also how are you generating the tiles? ka-map?, mapserv cgi, 
> mapscript? Are you projecting the data? How do you determine the extents 
> of tile A and B?
> 
> -Steve W
> 
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