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<div class="moz-cite-prefix">Ngày 2014-03-18 9:22 AM, Mike Toews
viết:<br>
</div>
<blockquote
cite="mid:CAM2FmMoabYtXmk=5v-W5aVQ7pjGAG7tx8p8Lp3JLyOOUGN5cdA@mail.gmail.com"
type="cite">
<pre wrap="">On 18 March 2014 15:15, Jackie <a class="moz-txt-link-rfc2396E" href="mailto:justaniceguy.nguyen@gmail.com"><justaniceguy.nguyen@gmail.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Here's my polygon:
ST_GeomFromText('POLYGON((105.78873 21.38659, 106.49185 21.38659, 105.78873
20.71758, 106.49185 20.71758, 105.78873 21.38659))', 4326)
</pre>
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<pre wrap="">
This polygon is an invalid bow-tie, with a self-intersection in the centre.
-Mike
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</pre>
</blockquote>
Hi Mike,<br>
It's my mistake. I swapped point No. 3 and point No. 4 and now the
message is "out of memory"<br>
Besides, I can get the result with one band, but when I try to merge
3 bands, it fails.<br>
<br>
<font face="Courier New, Courier, monospace">ST_GeomFromText('POLYGON((105.78873
21.38659, 106.49185 21.38659, 106.49185 20.71758, 105.78873
20.71758, 105.78873 21.38659))', 4326)</font>
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