Tagged Questions

0
votes
3answers
127 views

How do I stop the map at just one world/globe?

I am working on a project to put google maps layer and adding our data layers on top of it. using openlayers and google maps layer with out layer of top of it now the google layer has max resolution ...
-2
votes
0answers
41 views

Openlayers, geoserver and postGis

I checked many examples but i could not find one that does following.I need to select multiple parcels(polygons) by drawing lines.Selected parcels should have different color from the rest.After ...
-2
votes
0answers
78 views

How to show image in popup in openlayers from postgis using geoserver? [duplicate]

i want to store image in postgis. tell me how can i do it. then i want to retrive it from geoserver using openlayers . my main motto is to display that image in popup using openlayers through ...
0
votes
1answer
66 views

What should I start with WebGis Mapserver?

I'm not native English Speaker and I'm a graduated student who want to have a master degree in software engineering. I have a thesis relative with "Build a WebGis for air pollution in Vietnam's ...
1
vote
0answers
60 views

How to add legend in WFS openlayers

How i can publish WFS openlayer with legend, have tried different examples such as http://api.geoext.org/1.0/examples/vector-legend.js. But when i used tried this fire-bug shows an error=> ...
0
votes
1answer
40 views

Wrong projection on WFS layer with OSM baselayer [duplicate]

I am trying to add a vector layer with a WFS protocol. var wfs = new OpenLayers.Layer.Vector("WFS", { strategies: [new OpenLayers.Strategy.BBOX({resFactor: 1})], ...
1
vote
1answer
65 views

Win7 Senior users_Which pgRouting and postGIS versions are stable with postgreSQL8.4?

I'm working on a postgreSQL ,postGIS and pgRouting project on Windows 7 I need to work on a stable version (no time for risks), and I can see that many people are asking the same question many ...
0
votes
0answers
42 views

Add dynamic layer to geoext tree

I'm trying to add a dynamic OpenLayers Layer in a folder(children) of tree. I've tryed the following code and it works, but I don't know how to associate the layer with a layer of OpenLayers() type: ...
0
votes
1answer
68 views

OpenLayers - possible to display detailed GIS data?

I have an OpenLayers app to plot point features, but need to read in a very detailed multipolygon vector layer to plot an accurate location. I'm currently loading the polygon layer via TinyOWS. I've ...
0
votes
0answers
17 views

calculating st_simplify tolerance for openlayers

I want to display a vector layer in openlayers. Users can scale the map before they load the vector layer and I'd like to simplify the geometry with st_simplify before sending it to the client. Does ...
0
votes
1answer
73 views

Openlayers Linestring over edge of map

im trying to create a route displayer for ships. But im struggling with the edges of the map. When going from ie. 179* to 2* it displays a line across the entire map, instead of displaying it on the ...
1
vote
2answers
197 views

Create CMS system using Cartaro

The main objective for our project is to create a portal website in Drupal. On this website, people must be able to upload their geographical datasets (mostly shape files, but also xml files that ...
0
votes
0answers
62 views

geoserver PointStacker

I'm trying to implement a clustering solution using geoserver (version 2.3.0 ), for this I'm using the Rendering Transformation Point Stacker and the clustering itself works fine. However I have ...
1
vote
2answers
100 views

Load information about a feature

I must mention first of all that I am very new to this area... I am developing a GIS application. I created a simple map using geoserver with openlayers, it is all working through apache tomcat - and ...
1
vote
0answers
129 views

working with multiple wfs-t layers

I am using multiple wfs layers and using editing tools in that like edit,draw,save etc. The code is shown here...... var district = new OpenLayers.Layer.Vector("district(wfs)", { ...
2
votes
2answers
343 views

How to connect OpenLayers to PostGIS data?

I have read in OpenLayers how to load KML, GeoJSON etc. vector files in OpenLayers. But how can I connect to PostGIS data. If not, why should I upload my data to PostGIS then instead of directly ...
0
votes
1answer
105 views

Get lon/lat of feature in postgis

I'm hava a problem I have a point layer (shapefile) insert to postgis! I'm using MapServer and OpenLayer to display layer on map! Now, i want get lon/lat all feature of layer! Hope somebody can help ...
2
votes
0answers
56 views

Which is better for storage? Geometry column or varchar?

Objective: Need to store and retrieve a list of geometries from the database. Basically these are drawn by the user using OpenLayers which I would like to save and present again as a list (kind of ...
1
vote
1answer
116 views

Is it possible to import Openlayer data to PostGIS?

I'm struggled with the following problem: I'd like to import an Openlayer Layer to PostGIS in order to have the layer information for each grid point in a table. I know how to create a layer from ...
1
vote
1answer
170 views

How to create shortest route and multiple routes service using openlayers?

I created a digital database of many important features and locations of my city. and I want to create a web application in which shortest distance between two locations can be calculated and ...
1
vote
1answer
64 views

When we type an address in search bar, in some web mapping applications like google maps, a list of words automatically displayed from the database.

What is actually happening behind the code and how should be the code? when we search for a specifc word, will it look in the database (here it is postGIS) and lists the similar words.
1
vote
0answers
53 views

django + apache mod_tile

I'm not sure if I'm doing this right and I need your opinion on this current situation. I'm creating a Web Interface using django and postgres as the database. With regards to the slippy map, I went ...
0
votes
1answer
59 views

How to use bbox in long/lat with google/bing/etc… using mapserver‏

The bbox of OpenLayers.Control.GetFeature works in utm when the baselayer is 900913 ie. google/bing/etc) and in long/lat when the baselayer is 4326 (ie. my postgis layers served by mapserver), no ...
-1
votes
1answer
79 views

OpenLayers app on another site

I use OpenLayers, GeoServer and PostGIS in my application. app is served on apache httpd. and geoserver is served on apache tomcat. I use vector/wfs requests to display the features, so I use ...
2
votes
1answer
73 views

postgis values within XYZ viewport in openlayers

I got this XYZ server where I get my maptiles. Now, when the user is at zoom level 1 ( closest). I want it to execute a command that gets the current viewport from the map and Queries my PostGIS ...
2
votes
1answer
198 views

KML from PostGIS Geometry into Openlayers

im getting the KML value from my postgis database.. st_askml() And the output is like this: ...
3
votes
1answer
233 views

How to set up a background map in WGS84 projection for interactive map?

I've started developing my own interactive map and I have some things which are not clear to me. I heard that OSM, Google maps and all similar maps use Google Mercator projection. But if I use that ...
2
votes
0answers
92 views

How to PGRoute from OpenLayers via PostGIS/PostgreSQL [duplicate]

I need to route a shortest distance for a map which I have loaded from a PostgreSQL by means of JSON file. I can project the map in my browser and I can identify the linestrings. For a particular ...
3
votes
2answers
96 views

how to search for a Point of MultiLineString geometry in a json file using OpenLayers

I have a json file with large geometries(MultiLineString), here I got a Point among the json layer(baseLayer). I would like to search for a Point's LineString in the layer, from which MultiLineString ...
2
votes
2answers
277 views

KML from EPSG:4326 to EPSG:900913

im trying to create KML files manually (XML format) by extracting data from a postGIS database with "geography" values in a column. But i belive i need to transform the projection of each row in the ...
2
votes
1answer
64 views

How to save the edited features on a layer back to postgis table?

I have postgis + openlayer+ geoserver. I have developed an app which can show layers from postgis DB, allow user to edit,add,view features on a vector layer. Now, my need is to save the edited or ...
1
vote
4answers
297 views

Query Postgis Table with PHP

Would you be so kind as to help me with the following in OpenLayers. I need to be able to use the coordinates from a user click in a postgis query. To catch the coordinates of a click I built a click ...
1
vote
1answer
179 views

Broken image from mapserver, png not rendering

I'm trying to render WMS MapServer data on top of Google Maps using the OpenLayers JS library. My problem arises when I try to render the data as a series of points throughout the New York City area. ...
1
vote
2answers
253 views

How to project a geoJSON file in OpenLayers?

I have a json file well formed. I want to read a json file as a base layer from OpenLayers. <script type="text/javascript"> var styles = new OpenLayers.StyleMap({ ...
0
votes
1answer
86 views

Why does Geoserver not serve my primary key/ id?

I have a postgres/postgis table with the columns: gid [PK] serial NOT NULL, geom geometry(MultiPolygon,900913), crop text My layer in Geoserver however only shows me the feature types "geom" and ...
2
votes
0answers
122 views

Projecting PostGIS in Openlayers

I have a layer(base layer) with MultiLineString Geometries and now I need to project the layers(overlays) in the base layer from PostGIS using OpenLayers. However, I got an idea how to project table ...
4
votes
4answers
323 views

Caching / Preloading data for use with WMS queries

Hoping someone can help me with this issue. I've got a map implemented in my web application using OpenLayers that makes WMS queries to GeoServer that in turn queries a Postgres (PostGIS) database to ...
3
votes
2answers
293 views

General GeoDjango Opinion

I'm forced to crawl out of my intranet and create a public GIS site with quite an extensive dataset. All of my data is contained within PostGIS. I started dabbling with Geoserver/Postgis/OpenLayers ...
2
votes
1answer
117 views

GeoServer: Show (Random?) Subset of Features

Background We have a GeoServer layer backed by a PostGIS table with 22 million smallish features covering the continental US. We're using GeoServer to serve the features as a WMS layer to a client ...
8
votes
2answers
338 views

Best design for Open Source Python / PostGIS prototype

I am writing a data intensive web application that is delivered through apache. My question is about how to best arrange processing given that there are multiple options. I have at my disposal ...
0
votes
1answer
376 views

Editing layers in geoserver with web application

I wanted to edit layers in geoserver where they are store in PostGIS database. I have refereed ...
2
votes
0answers
96 views

Displaying text from dxf in Openlayers

I managed to import .dxf into Postgis table, and now have, among others, rows with Point geometries and values in text column (which corespodent with Label values from ACAD .dxf). What is the best ...
1
vote
0answers
418 views

searching GeoJSON features

After googling for many days and reading the OL documentation, I don't understand well how the filterToParams in OpenLayers.HTTP protocol should work, what I'm trying to do is to find and display the ...
0
votes
0answers
103 views

how to show LINESTRING intersection with other layers in Openlayers?

I'm using Postgis/Geoserver/Openlayers and I have a query that gets al the "towns" that are near a "road". Now, "road" and "towns" are different layers, and I want to show them in Openlayers. But I ...
2
votes
3answers
389 views

adding non spatial attributes using geoserver

I am using Openlayers + geoext to perform transaction operations in postgis database using geoserver . i can insert spatial data into postgis but cannot insert other data like road name, road type in ...
15
votes
4answers
552 views

What are some high-profile websites that use OpenLayers and PostGIS?

I think there are many convincing arguments for using PostGIS but I am interested in showing people examples of websites that use PostGIS and OpenLayers. Some examples that I have seen are: ...
0
votes
1answer
169 views

How to insert non-spatial data through WFS-T insert?

When i perform wfs-t insert operation using postgis database only spatial data and primary key gets inserted. Can anyone point me to some examples in which attribute data are also inserted along ...
1
vote
0answers
241 views

Openlayers WFS Overlay Problem

a) I am running a PostGIS database, and I want to display a Table with a about 500 Points of Interest. The POIs have the projection EPSG 4326. b) Geoserver is installed, running and connected to my ...
1
vote
0answers
462 views

How to fire a query from OpenLayers to GeoServer to fetch 'the_geom' column in PostGIS table?

I am coloring the polygon shapes of world_country. I have OpenLayers in my UI, GeoServer as server and PostGIS as db. All I want is fire this query: select the_geom from world_country where ...
0
votes
0answers
86 views

Why does Geoserver save features in wrong projection?

I edit WFS layer with openlayers and after editing save changes. But edited object saved in wrong projection. At first Geoserver get layer from PostGIS with projection EPSG70066. In geoserver i ...

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