Tagged Questions
1
vote
0answers
38 views
How can I assign road names from OSM to gis linestrings using open source tools?
Starting with a shapefile of linestrings I want to assign street names to these lines if there is a match with a road/street in OpenStreetMap.
There are no exact matches as the linestrings have a ...
1
vote
1answer
85 views
Automatic bulk snapping with FOSS
I'm looking for a tool that would be able to automatically snap features closer than a given distance. Is there such a tool/plugin for QGIS/GRASS/OpenJump? Would it be possible to achieve that with ...
-2
votes
1answer
55 views
expalin about ST_Makeline and its syntyax and forms [closed]
expalin about ST_Makeline and its syntyax and forms.
how we can store the resiltant line string into spatial table?
3
votes
1answer
112 views
Parse error while inserting values into polygon feature
I created a polygon as follows
create table boundary (id int, name text);
table created;
select AddGeometryColumn ('',boundary', 'latlon' 4326,'POLYGON', 2);
geometry column added;
then i'm ...
4
votes
1answer
274 views
How you can repair invalid topology errors within postgis?
I've imported the shapefile of corine land cover project to my postgis database and the
select gid, ST_IsValidReason(geom) from gis.clc2000 where not ST_IsValid(geom);
returns in every occasion
...
2
votes
2answers
141 views
Opensource Tools for Optimizing Server Performance
I use a server with a basic Microsoft OS primarily for data storage and as a central repository for edited vector data. These data are not intended to be used as mapping or GIS products available ...
2
votes
3answers
334 views
Which open source software to create desktop interface for Geo-processing tools?
I want to create an desktop interface to create geo-processing tool and that to using Open source GIS software. I will be using Postgresql and postgis too to save and retrieve data for operations. I ...
14
votes
4answers
2k views
How to create a simple front-end for a PostGIS database?
My organisation collects a lot of environmental monitoring data (stream flow, water chemistry etc.) most of which is currently stored in Excel. I’d like to get everything into a database – probably ...
1
vote
1answer
784 views
How to connect GeoServer with Java to a PostGIS/PostGres database?
I am having trouble using GeoServer to perform a shortest path analysis between two network points. My question is about connecting GeoServer with Java to a PostGIS/PostGres database.
I know that in ...
5
votes
1answer
477 views
Memory leak in ArcGIS aggregate points/buffer/Addfield/cursor
I am starting to have concerns about the ability of ArcGIS 10 to fulfill a deliverable of mine. It got me to wondering what exactly else there is, that can perform similar functionality?
ET ...
3
votes
2answers
140 views
How to bring polygons closer to a point?
I have some scattered polygons with a lot of space between them.
I want to make a thematic map but all that white space doesn't look very good, so I want to bring the polygons closer to the center of ...
7
votes
2answers
451 views
What are the Pros and Cons of hstore data type in postgis?
PostgreSQL has a module named hstore that implement the use of key/value pairs (it's something like the OpenStreetMap model, but in a single table).
What are the Pros and Cons of hstore regarding GIS ...
3
votes
3answers
681 views
In Qgis, Is it possible to edit the datasource of a Postgis layer?
After creating a layer with RT_SQL_Layer plugin, I want to change some details in the query. Is it possible? or I have to aways create a new layer every time I want to change something in the query?
...
9
votes
2answers
2k views
How to import esri Personal Geodatabase (.mdb) to PostGIS on Linux
We have esri Personal Geodatabases that we need to import into PostGIS.
Ultimately, we'd like to allow people to upload an MDB on a web server, and have it import the layers into PostGIS.
On ...
1
vote
1answer
737 views
psycopg2 error with QGIS 1.5
So I just installed QGIS 1.5 using the windows installer not the osgeo4w one and now any plugins that need access to PostgreSQL databases don't seem to work, they all throw a:
"Couldn't import Python ...
