Operation of removing unwanted details from data, data smoothing algorithm for clearing the general view. For a raster, it is a processing window where the cell values are changed.

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2
votes
1answer
390 views

combine two OCG filters in Openlayers : ERROR: invalid input syntax for integer

i need to combine two OCG filters. each one works fine separably but if i combine them using Filter.Logical.OR, the first one works only. var c_filter = new OpenLayers.Filter.Logical({ type: ...
1
vote
1answer
37 views

Creating New Layer After Sorting Attribute Table using QGIS?

I have been self-teaching myself some open source GIS. I downloaded QGIS and have been following this four part tutorial - ...
0
votes
1answer
35 views

WFS Filter Buffer around a point

I'm trying to make a buffer around a geometry (point/s,linestring,etc) using WFS queries without luck. This is what I've been doing: <ogc:Filter> ... <ogc:Function ...
0
votes
1answer
43 views

Filter geojson or shapefiles

I'm trying to create a geojson file with a few shapes of roads from OSM. Now, I've been able to get shapefiles of the greater region (province) these roads are in from http://download.geofabrik.de/ . ...
5
votes
0answers
289 views

Create custom Authentication filter in GeoServer 2.3.0

Context In my current project, I've the requirement to validate that requests coming to GeoServer (2.3.0) are allowed. The project holds those facts: the GS client cannot provide the principal ...
3
votes
0answers
81 views

Filtered SimpleFeatureCollection really slow on Map and other operations

I'm working with a shapefile having about 85.000 features. I need to select some of these using a filter and then showing these on a map. Now... If I draw the entire shapefile's features the creation ...
3
votes
0answers
315 views

SLD filter with embedded strTrim function in Geoserver

Using Geoserver 2.2.2 (GeoTools Version 8.4) on Windows 7, I'm trying to create a SLD that trims the leading and trailing spaces of a string property (using the strTrim function) and compares it to a ...
2
votes
0answers
227 views

Geoserver CQL Cross Layer Intersection Failing

I am having trouble forming a properly formatted CQL request using geoServer cross layer filer functions and was hoping others could assist. My request is as follows: ...
1
vote
0answers
12 views

C++ parser for OGC Filter Encoding 1.0

I'm developing a C++ application and I have to parse a OGC Filter in order to implement querying functionality on a metadata repository. Does anyone know any C++ library to parse OGC Filters? Thanks. ...
1
vote
0answers
206 views

How to use SLD to filter a WMS layer but without setting any styles?

I'm trying to filter (using OpenLayers) a WMS layer, served by MapServer. I've got this working by building the appropriate OpenLayers.Filter rule(s) with an empty Polygon symbolizer (so no specific ...
1
vote
0answers
88 views

Kalmanfilter GNSS IMU

I want to make an uncoupled Kalman filter. The input data are GPS and the output of my strapdown Algorithm from the IMU. The Strapdown Algorithm is used to calculate the actual position and velocity ...
1
vote
0answers
74 views

How do I account for changing latitude with a spatial filter?

I'm working with data in latitude/longitude grid form in a non-GIS specialised package (MATLAB) and wish to apply spatial filters to it. As this data contains a broad range of latitudes and is ...
1
vote
0answers
158 views

How can I map data points to OpenStreetMap (OSM) line data?

my goal is to filter measuring points of vehicles by mapping them to streets. So I could filter out all the false data located in fields and rivers and so on. I imported my data into a PostGIS ...
0
votes
0answers
7 views

Parsing OGC Filters with C++

Google Translation I am developing an application in C + + you need to parse OGC filter. Anyone know any way to parse an OGC filter with C + +? Estoy desarrollando una aplicaciĆ³n en C++ que ...
0
votes
0answers
18 views

Dataset required with GPS and accelerometer data

Can anyone please suggest me site or provide me a dataset which has GPS data with accelerometer data as well.I am doing a project where using accelerometer data i am trying to improve the accuracy of ...
0
votes
0answers
25 views

SetSpatialFilter worked unexpected when using ogr by python

I am using ogr python binding to read the shapfile, this is the code: ..... bbox="POLYGON ((20.18164062 30.63867188,20.63867188 30.63867188,20.63867188 30.18164062,20.18164062 30.18164062,20.18164062 ...
0
votes
0answers
28 views

How can I remove dipoles from rasterlayer in QGIS 2.2?

I work with geomagnetic survey data. When convertet into a rasterlayer, every object with a high magnetic potential (for exampel an iron-nail on the surface) is shown as very sharp anomalie called ...
0
votes
0answers
21 views

How to get page number of Feature in GeoServer 2.4?

I have GeoExt-based client and FeatureGrid with PagingToolbar in it. Also I have a big vector layer (6018 features), so I have to use grid with multiple pages. I want to synchronise grid with map. ...
0
votes
0answers
51 views

setSubsetString with limit?

I have a layer with couple thousands objects in QGIS and I would like to create a filter of the layer where result would be only one object. I would like to do it in console or plugin. I am using ...
0
votes
0answers
138 views

OpenLayers Mapserver spatial filter INTERSECTS format problems

Trying to get hand-drawn polygon delimiter for spatial query via OpenLayers to mapserver (then postgis). I can get the WKT of the drawn polygon and can substitute the dynamic values, but am having ...
0
votes
0answers
56 views

Change feature's image when it's not clustered

I'm clustering the features on the layer using AnimatedCluster this way: dataLayer = new OpenLayers.Layer.Vector("Data", { strategies: [ new ...
0
votes
0answers
52 views

OGR: How to control the spatial reference of a layer?

I want to use a subset of a shape for a spatial filter. The filter returns 0 features which is unexpected. So I was checking the spatial references of the layers and one of them seems to have none. ...
0
votes
0answers
54 views

What's the difference between FID and EID Tag in Filter_Capabilities for WFS Version 1.1.0

The GetCapabilities Response containts the following part for filtering with the FeatureId. I can't find nothing which explains the meaning of FID or EID. <ogc:Filter_Capabilities> : ...