Tilestache: Not able to render data from postGIS SQL

[Akulkarni1]

my tilestache.cfg is as below:
{
"cache": {
"name": "Disk",
"path": "mnt/tile-cache/"
}
,
"layers":
{
"countries":
{
"provider": {
"name": "vector",
"driver": "PostgreSQL",
"parameters":
{
"dbname": "test1",
"host" : "localhost",
"port" : "5432",
"user": "postgres",
"password":"postgres",
"table": "ne_110m_admin_0_countries",
"query":"SELECT admin, ST_Y(ST_Centroid(wkb_geometry)) as lattitude FROM ne_110m_admin_0_countries;"

         }}}}}

I am getting error as

File "/usr/local/lib/python2.7/dist-packages/TileStache-1.51.6-py2.7.egg/TileStache/init.py", line 303, in requestHandler2
print >> out, 'Known unknown!'

URL using is as below

I am using URL as localhost:8080/countries/1/1/1.json

Not able to render data.

[Aldo Culquicondor]

Can you please provide the content of the response?

[Aldo Culquicondor]

Also, can you confirm that you are running python 2.7.x?

[Michal Migurski]

What’s the admin column? If it’s not a PostGIS geometry, then I’m guessing you’re not selecting one and TileStache has nothing to return in vector form.

[Akulkarni1]

Hi,
I am using python 2.7.x.
I tried with below query.
Select gid,geom AS geometry from public.be-water-area_multiploygon
from the table below.

below is the response

Please help me with the above.

Thanks in advance.
Best regards,
Amit.

[Akulkarni1]

ok , shall try with the same.
Thanks for the help.

[Akulkarni1]

Able to render the data.
Thanks for the help.

[Gabriel Fair]

@Akulkarni1 Where did you use "io.BytesIO" to get it working?