Is this a bug of pycoast 0.5.2?

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張伯誠

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Dec 15, 2014, 10:56:39 PM12/15/14
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Hello,

See the attached images, the area definition of lon_0_lat_0.png is:

REGION:equirectangular{

NAME:eqc
PCS_ID:eqc
PCS_DEF: proj=eqc, lat_0=0.0, lon_0=0.0 
XSIZE:2048
YSIZE:1024
AREA_EXTENT:(-20037508.342789244,-10018754.171394622,20037508.342789244,10018754.171394622)
};

the other is lat_0=0.0, lon_0=180.0, the remaining is the same.


lon_0_lat_0.png is nice but lon_180_lat_0.png has many useless horizontal lines. 
If you take a closer look at it, you would find that the lines come from the border of South Africa.

Is it a bug of pycoast 0.5.2? 
I think pycoast does not handle such situation, 
e.g., half continent is in the right side while the other part is in the left side.



Bocheng
lon_180_lat_0.png
lon_0_lat_0.png

Hróbjartur Þorsteinsson

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Dec 16, 2014, 4:47:15 AM12/16/14
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You are right.
Coastlines need a consistency check
that drawn line-segments do not exceed some sort
of threshold. We had considered that, but now
I think I should add that improvement.

Cheers,
Hrob.


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