[Geomoose-users] Question about polygon queries

[Brent Fraser]

Dan,

   Good point.  When Sacha said "the area of each type that falls inside my 
custom polygon", I thought that was referring to calculating the area (e.g. 
square kilometers) of each type in the input polygon.

Brent

Dan Little wrote:
> Is this just a type of select query using a drawn polygon? If so, I thought that was demonstrated in the demo...
> 
> 
> ----- Original Message ----
>> From: Brent Fraser <bfraser at geoanalytic.com>
>> To: Sacha Black <sacha.black at gmail.com>
>> Cc: geomoose-users at lists.sourceforge.net
>> Sent: Sun, March 14, 2010 8:58:37 PM
>> Subject: Re: [Geomoose-users] Question about polygon queries
>>
>> Sacha,
> 
>   As far as I know, Geomoose has no capability to do 
>> this.  While there
> are some tools in Geomoose to draw a polygon, you 
>> would need to write
> some server-side scripting (for example, in PHP) to take 
>> the drawn
> polygon and do an Intersection on the soils layer, possibly using 
>> the
> OGR_G_Intersection function in GDAL's OGR API (although I'm not 
>> sure
> that function is available through MS4W's OGR PHP library).
> 
> Best 
>> Regards,
> Brent Fraser
> 
>> I have a soils layer and I can use Geomoose 
>> information tool to query
>> (by point or rectangle) a soil polygon or 
>> polygons to get the soil
>> types. I would like to find out if it is 
>> possible to draw an arbitrary
>> (non-rectangular) polygon and use that 
>> polygon to get a list of the
>> sail types, and the area of each type that 
>> falss inside my custom
>> polygon.
>>
>> I know how to construct 
>> the queries I need to run in PostGIS, but what
>> I don't know how to do is 
>> how to draw & pass the custom query area
>> from GeoMoose to PostGIS. 
>> Is this currently possible? Where would I
>> look if I were trying to add 
>> this functionality?
>>
>> thanks for any suggestions,
>>
>>
>> Sacha
>>
>>
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