wrote:
>> Would not there be isolines of the same signal strength? In that case there
>> is no unique x,y for a given signal strength...
>> On 2011-06-21 9:54 PM, "Saka Royban" wrote:
>>> yes, of course.there is a unique x,y for each triple measurements
n you will
probably have a hard time with your subsequent computations...
On 2011-06-21 9:57 PM, "Chris Hermansen" wrote:
> Would not there be isolines of the same signal strength? In that case there
> is no unique x,y for a given signal strength...
> On 2011-06-21 9:54 PM, &qu
Subject: Re: [postgis-users] Interpolation problem
What are the three measurements? Is it reasonable to assume that knowing three
measurement values tells you the location ie is there a unique x,y for each
triple of measurements?
On 2011-06-21 8:54 PM, "Saka Royban" wrote:
> Hi all
&
Hi all
I'm not sure whether this can be done completely via PostGIS or it needs some
programming. Anyway, at this step no problem with programming if Knowing the
way
and algorithm.
I have point shapefile (arranged like a grid) and for each point there is 3
similar measurements (obtained via 3
platform for testing for a year.
Sean
On Mar 9, 5:38 am, Saka Royban wrote:
> Hi all
> I wonder if there is any free postgis host on the web for testing an asp.net
> application which uses postgis?
>
> regards
>
> ___
> postgis-use
Hi all
I wonder if there is any free postgis host on the web for testing an asp.net
application which uses postgis?
regards
___
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http://postgis.refractions.net/mailman/listinfo/po
hi
I'm so sorry. i was so mad because i didn't find ST_IsValidReason function
myself.
Thanks to PostGIS and its developers, it works nice.
Also, i found an option in OpenJump for validating features.
Best Regards
____
From: Saka Royban
To: Pos
cause it's
built by the database (by GEOS, in this case) it is built according to
the known topology rules we want, and hence is more likely to be
valid.
P.
On Wed, Dec 29, 2010 at 12:21 PM, Saka Royban wrote:
> Hi all.
> I was reviewing postgis workshop presented in FOSS4G 2007. it pr
Hi all.
I was reviewing postgis workshop presented in FOSS4G 2007. it presents a trick
like this for making invalid features valid:
UPDATE bc_voting_areas
SET the_geom = ST_Buffer(the_geom, 0.0)
WHERE gid = 4897;
I'm wondering how it works in background!!!. I mean how buffering with zero
distanc
Thanks a lot
I found some good materials about raster in a link provided by ThomasG. i
didn't
know anything about implementing raster in postgis.
However, by exercise i meant some materials for advancing and becoming
professional in writing spatial queries, if there is.
(i'm also considering som
Hi all.
as i'm newbie to spatial databases, i'm looking for some exercises to work more
on spatial sql and its conecepts i.e. spatial functions, operators, etc.
is there any online materials?
i just found a workshop presented in FOSS4G conference, but it's not enough
(unfortunately, postgis book i
thanks
worked well
From: Jorge Arévalo
To: PostGIS Users Discussion
Sent: Fri, November 19, 2010 12:26:15 AM
Subject: Re: [postgis-users] How to understand SRID of data?
On Thu, Nov 18, 2010 at 7:28 PM, Saka Royban wrote:
> Hi all
> I'm new to
Hi all
I'm new to postgis and saw in tutorial sth about finding SRID of data i.e via
prj2epsg.org site.
Is there any other way to get SRID of data?
regards
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http://postgis.refr
Hi everyone.
i've used workshop material of FOSS4G2007 to learn postgis along with its data.
but there is a problem
i got this error in first attempt to retrieve data from postgis:
msDrawMap(): Image handling error. Failed to draw layer named
'bc_municipality'. prepare_database(): Query error. E
Hi all.
I just wonder if there is a code for doing 2 shapefile union and intersection,
all geometries by doing geometry by geometry and thus giving the result as a
new shapefile. Is there any or i should write my own?
Thanks in advance
___
post
Hi all.
I've a large set of points and a set of polygons. I have written a program for
point in polygon of these dataset even writing its algorithm.
I wanted to know about performance of doing this by PostGIS. however a cost of
connection to postgis exists.
also, can i do it in a bunch manner ot
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Saka
Royban
Sent: Wednesday, July 16, 2008 6:16 AM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] newbie question: PostGIS and .NET?
It means using SharpMap i can load shapfiles to PostGIS, perform the
query a
ion: PostGIS and .NET?
Quoting Saka Royban <[EMAIL PROTECTED]>:
> Hi all.
> Sorry for elementary question. but i didn't find anything to support
> PostGIS in .NET environment.
> just some driver for Java.
> I mainly wanna make a desktop GIS applications and it sound
Hi all.
Sorry for elementary question. but i didn't find anything to support PostGIS in
.NET environment.
just some driver for Java.
I mainly wanna make a desktop GIS applications and it sounds PostGIS helpful to
be used as a back-end to manage large number of shapefiles. So, is there a way
to
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