[web2py] Re: Spatial/GIS: find records within X distance of point?
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html (note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for all
records within X distance from the reference point. Using raw SQL I would
use ST_DWithin http://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112 -76.33)',4326),
0.1)
But web2py does not seem to support ST_DWithin only st_within. So how
can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[web2py] Re: Spatial/GIS: find records within X distance of point?
OK. This needs more work than anticipated. Looks like the Query object only
supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html (note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for all
records within X distance from the reference point. Using raw SQL I would
use ST_DWithin http://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112 -76.33)',4326),
0.1)
But web2py does not seem to support ST_DWithin only st_within. So how
can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[web2py] Re: Spatial/GIS: find records within X distance of point?
Forgive me because I don't understand anything about the internals of
web2py but doesn't REPLACE take three parameters:
def REPLACE(self, first, (second, third)):
return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'),
self.expand(second,'string'),
self.expand(third,'string'))
Also:
def ST_ASGEOJSON(self, first, second):
http://postgis.org/docs/ST_AsGeoJSON.html
return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'],
self.expand(first), second['precision'], second['options'])
Or do you mean something different?
On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote:
OK. This needs more work than anticipated. Looks like the Query object
only supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html (note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for all
records within X distance from the reference point. Using raw SQL I would
use ST_DWithin http://postgis.refractions.net/docs/ST_DWithin.html
doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112 -76.33)',4326),
0.1)
But web2py does not seem to support ST_DWithin only st_within. So how
can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[web2py] Re: Spatial/GIS: find records within X distance of point?
Actually you do understand a lot of about this. That's a trick. It works.
We can use it in this case too, until we come up with a better design.
I used the same trick as in REPLACE, in trunk. Please give it a try.
Massimo
On Monday, 9 December 2013 16:33:09 UTC-6, User wrote:
Forgive me because I don't understand anything about the internals of
web2py but doesn't REPLACE take three parameters:
def REPLACE(self, first, (second, third)):
return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'),
self.expand(second,'string'),
self.expand(third,'string'))
Also:
def ST_ASGEOJSON(self, first, second):
http://postgis.org/docs/ST_AsGeoJSON.html
return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'],
self.expand(first), second['precision'], second['options'])
Or do you mean something different?
On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote:
OK. This needs more work than anticipated. Looks like the Query object
only supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html
(note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for
all records within X distance from the reference point. Using raw SQL I
would use
ST_DWithinhttp://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112
-76.33)',4326), 0.1)
But web2py does not seem to support ST_DWithin only st_within. So how
can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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You received this message because you are subscribed to the Google Groups
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[web2py] Re: Spatial/GIS: find records within X distance of point?
Thanks, on line 2987 I believe the format string is missing the 3rd '%s'
parameter:
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
Should be:
return 'ST_DWithin(%s,%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
On Monday, December 9, 2013 6:06:32 PM UTC-5, Massimo Di Pierro wrote:
Actually you do understand a lot of about this. That's a trick. It works.
We can use it in this case too, until we come up with a better design.
I used the same trick as in REPLACE, in trunk. Please give it a try.
Massimo
On Monday, 9 December 2013 16:33:09 UTC-6, User wrote:
Forgive me because I don't understand anything about the internals of
web2py but doesn't REPLACE take three parameters:
def REPLACE(self, first, (second, third)):
return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'),
self.expand(second,'string'),
self.expand(third,'string'))
Also:
def ST_ASGEOJSON(self, first, second):
http://postgis.org/docs/ST_AsGeoJSON.html
return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'],
self.expand(first), second['precision'], second['options'])
Or do you mean something different?
On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote:
OK. This needs more work than anticipated. Looks like the Query object
only supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html
(note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for
all records within X distance from the reference point. Using raw SQL I
would use
ST_DWithinhttp://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112
-76.33)',4326), 0.1)
But web2py does not seem to support ST_DWithin only st_within. So
how can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
web2py-users group.
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to web2py+unsubscr...@googlegroups.com.
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[web2py] Re: Spatial/GIS: find records within X distance of point?
You are right. Please check again.
On Monday, 9 December 2013 17:16:17 UTC-6, User wrote:
Thanks, on line 2987 I believe the format string is missing the 3rd '%s'
parameter:
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
Should be:
return 'ST_DWithin(%s,%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
On Monday, December 9, 2013 6:06:32 PM UTC-5, Massimo Di Pierro wrote:
Actually you do understand a lot of about this. That's a trick. It works.
We can use it in this case too, until we come up with a better design.
I used the same trick as in REPLACE, in trunk. Please give it a try.
Massimo
On Monday, 9 December 2013 16:33:09 UTC-6, User wrote:
Forgive me because I don't understand anything about the internals of
web2py but doesn't REPLACE take three parameters:
def REPLACE(self, first, (second, third)):
return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'),
self.expand(second,'string'),
self.expand(third,'string'))
Also:
def ST_ASGEOJSON(self, first, second):
http://postgis.org/docs/ST_AsGeoJSON.html
return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'],
self.expand(first), second['precision'], second['options'])
Or do you mean something different?
On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote:
OK. This needs more work than anticipated. Looks like the Query object
only supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at http://postgis.org/docs/ST_DWithin.html
(note
the 'D'). Also looks like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field
(using PostgreSQL 9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for
all records within X distance from the reference point. Using raw SQL
I
would use
ST_DWithinhttp://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112
-76.33)',4326), 0.1)
But web2py does not seem to support ST_DWithin only st_within. So
how can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
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[web2py] Re: Spatial/GIS: find records within X distance of point?
This appears to be working correctly now thank you. One more thing: the
docstring on line 2985 is referencing the wrong PostGIS function
(ST_Within), it should be:
http://postgis.org/docs/ST_DWithin.html
(note the D)
On Monday, December 9, 2013 6:54:53 PM UTC-5, Massimo Di Pierro wrote:
You are right. Please check again.
On Monday, 9 December 2013 17:16:17 UTC-6, User wrote:
Thanks, on line 2987 I believe the format string is missing the 3rd '%s'
parameter:
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
Should be:
return 'ST_DWithin(%s,%s,%s)' %(self.expand(first),
self.expand(second, first.type),
self.expand(third, 'double'))
On Monday, December 9, 2013 6:06:32 PM UTC-5, Massimo Di Pierro wrote:
Actually you do understand a lot of about this. That's a trick. It
works. We can use it in this case too, until we come up with a better
design.
I used the same trick as in REPLACE, in trunk. Please give it a try.
Massimo
On Monday, 9 December 2013 16:33:09 UTC-6, User wrote:
Forgive me because I don't understand anything about the internals of
web2py but doesn't REPLACE take three parameters:
def REPLACE(self, first, (second, third)):
return 'REPLACE(%s,%s,%s)' % (self.expand(first,'string'),
self.expand(second,'string'),
self.expand(third,'string'))
Also:
def ST_ASGEOJSON(self, first, second):
http://postgis.org/docs/ST_AsGeoJSON.html
return 'ST_AsGeoJSON(%s,%s,%s,%s)' %(second['version'],
self.expand(first), second['precision'], second['options'])
Or do you mean something different?
On Monday, December 9, 2013 4:45:27 PM UTC-5, Massimo Di Pierro wrote:
OK. This needs more work than anticipated. Looks like the Query object
only supports unary and binary operators. Give me a little more time. ;-)
On Monday, 9 December 2013 12:21:37 UTC-6, User wrote:
Thanks. This is what I see at line 2983 in dal.py:
def ST_DWITHIN(self, first, second):
http://postgis.org/docs/ST_Within.html
return 'ST_DWithin(%s,%s)' %(self.expand(first),
self.expand(second, first.type))
The proper documentation is at
http://postgis.org/docs/ST_DWithin.html (note the 'D'). Also looks
like this is missing the 3rd argument to ST_DWithin:
boolean *ST_DWithin*(geometry g1, geometry g2, double precision
distance_of_srid);
On Sunday, December 8, 2013 9:25:35 AM UTC-5, Massimo Di Pierro wrote:
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field
(using PostgreSQL 9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading
geometry is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for
all records within X distance from the reference point. Using raw SQL
I
would use
ST_DWithinhttp://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112
-76.33)',4326), 0.1)
But web2py does not seem to support ST_DWithin only st_within. So
how can I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
You received this message because you are subscribed to the Google Groups
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[web2py] Re: Spatial/GIS: find records within X distance of point?
Added ST_Dwithin support in trunk. Please check it.
On Sunday, 8 December 2013 07:02:06 UTC-6, User wrote:
I'm storing latitude/longitude coordinates in a geometry field (using
PostgreSQL
9.1.10):
Field('point', 'geometry()')
I understand there is also the geography type but from my reading geometry
is faster and is suitable for small distances (
http://workshops.boundlessgeo.com/postgis-intro/geography.html#why-not-use-geography
)
I want users to be able to specify a reference point and search for all
records within X distance from the reference point. Using raw SQL I would
use ST_DWithin http://postgis.refractions.net/docs/ST_DWithin.html doing
something like
SELECT name, ST_AsText(point)
FROM mytable
WHERE ST_DWithin(point, ST_GeomFromText('POINT(40.47112 -76.33)',4326),
0.1)
But web2py does not seem to support ST_DWithin only st_within. So how can
I achieve a similar result in web2py?
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
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