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I've found some examples of how to dissolve features in a polygon
using gdal but I'm not familiar with how to implement them. <br>
here is an example of what I've found, but I'm having trouble
modifying it<br>
<br>
this is what I've come up with:<br>
<pre style="margin: 0px 0px 10px; padding: 5px; border: 0px; font-size: 12px; vertical-align: baseline; overflow: auto; width: auto; max-height: 600px; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; word-wrap: normal; color: rgb(51, 51, 51); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: 18px; orphans: auto; text-align: left; text-indent: 0px; text-transform: none; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(238, 238, 238);"><code style="margin: 0px; padding: 0px; border: 0px; font-size: 12px; vertical-align: baseline; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; color: rgb(34, 34, 34); white-space: inherit; background-color: rgb(238, 238, 238);">ogr2ogr output.shp
input.
shp -dialect sqlite -sql
"SELECT ST_Union(geometry), dissolve_field FROM input GROUP BY dissolve_field"</code></pre>
<br>
it looks to me that it is trying to do this operation based on
specific attribute entries but I'm looking to ignore the attribute
entrie and make all features into one. <br>
This is what I've tried:<br>
<span style="color: rgb(68, 68, 68); font-family: 'Helvetica Neue',
Helvetica, Arial, sans-serif; font-size: 13px; font-style: normal;
font-variant: normal; font-weight: normal; letter-spacing: normal;
line-height: 17px; orphans: auto; text-align: left; text-indent:
0px; text-transform: none; white-space: normal; widows: 1;
word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline
!important; float: none; background-color: rgb(250, 250, 250);">the
32768.shp has an attribute named BLOCK and it's still not
working.. any ideas? >ogr2ogr -f "ESRI Shapefile" output.shp
32768.shp -dialect sqlite -sql "select ST_union(block) from
'32768'" Warning 6: Normalized/laundered field name:
'ST_union(block)' to 'ST_union(b</span><br>
<br>
I am confused as to what I should be putting in the parenthasis of
ST_Union()<br>
<br>
Please advise.<br>
Thank you<br>
<br>
<br>
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Steven Lutz<br>
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