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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0
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1answer
86 views

WFS Filtered : The filters that worked for me in 1.8 - gives no results in 2.0

Using Quantum GIS 1.8.0 and 2.0.1 desktop on windows XP 32bit Server: http://vmgeoserver.vd.dk/geoserver/VD/ows?version=1.1.0 Setting filter for VD:vma_admdata: "BESTYRER" = '230' AND ...
3
votes
0answers
90 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 ...
0
votes
1answer
339 views

Geodjango: Using Lat / Lon to Buffer from Point

I want to have a radius based distance search. To do this, I want to create a buffer around a point object so that I can filter objects that are inside this buffer, a method that I learned based on a ...
0
votes
0answers
171 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 ...
1
vote
2answers
382 views

Custom filters (server side) for Openlayers Vector Layer

I have a vector layer in openlayers with source in GEOJSON (custom php server, which I have in complete control) and BBOX strategy. Vector points contain point sources which have different ...
1
vote
2answers
360 views

How to extract features with specific coordinates from a ShapeFile?

I would like to extract a number of features from a ShapeFile which match with specific latitude/longitude values. I am interested if/how this can be done with QGIS and ogr2ogr. The output should be ...
0
votes
1answer
74 views

Mapserver 6.2 concatenate attributes in FILTER

Back in version 5.0 I had: FILTER ("<tcode:expression/>" eq '[STATE][COUNTY]') final version = FILTER ("11000" eq '[STATE][COUNTY]') so I would filter out the features with state = 11 and ...
0
votes
1answer
283 views

How add vector style rule filter with different value in table

I have a simple wfs layer from geoserver, here is code: //wfs-t editable overlay var wfs_layer = new OpenLayers.Layer.Vector("Vector sample", { strategies: [new OpenLayers.Strategy.Fixed()], ...
1
vote
0answers
106 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 ...
0
votes
1answer
95 views

Intersects Filter on WFS 1.0.0

I use WFS=1.0.0 on the Mapserver v5.6.6 and v6.0.1 with MS4W package. I want to get the Intersects of Spatial Operator. When I make getcapabilities request I see just "Intersect" like: ...
1
vote
1answer
204 views

How to set a spatial filter with Python/GDAL?

Is there a way with GDAL (Python) to set a spatial filter (bounding-box) on a raster before I process it? I want to read it as an array. BandReadAsArray(band, xoff=0, yoff=0, win_xsize=None, ...
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vote
0answers
84 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 ...
5
votes
1answer
368 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 ...
0
votes
1answer
207 views

Local variance image in python using gdal and a running window approach

I want a local variance image with a 3x3 of a geospatial raster image using python. My approach so far was to read in the raster band as an array, then using matrix notation to run a moving window and ...
1
vote
1answer
196 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 ...
1
vote
1answer
40 views

GeoServer FeatureID Filter Limits

we've made an application that uses GeoServer WMS tiles on an OpenLayers map. We have a layer of Bus Stops which we filter based on search results from previous search i.e. User searches for 'The ...
2
votes
0answers
271 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
2answers
756 views

GeoServer Where clause filter

I use postgis, geoserver and openlayers for gis development. I simply reach from goeserver to postgis table or view and show it with openlayers. but I need some filtering operation on my spatial ...
2
votes
1answer
87 views

Is it possible to use a WHERE clause with Grass v.in.ogr for DGN sources?

I am trying to import a .DGN with Grass v.in.ogr in QGIS. I am able to import the DGN perfectly, but I would like to filter the elements using the WHERE option. From searching, reading and testing I ...
3
votes
1answer
243 views

How to filter layer of osm data?

I have a table osm_roads that has a column named geometry geometry geometry(LineString,900913). If I want to filter a city to draw districts, I cannot do it by geographic coordinates? What if in ...
0
votes
1answer
391 views

OpenLayers.Filter.Logical not working

I have the following code: var map = {}; var googleMercator = new OpenLayers.Projection("EPSG:900913"); var wgs84 = new OpenLayers.Projection("EPSG:4326"); var lyr_osm = {}; var texas ...
1
vote
0answers
105 views

Leaflet Call to GeoServer for GeoJson [duplicate]

Possible Duplicate: GeoServer Callback Function Undefinded I've gotten this far by following examples mentioned below, but I'm stuck. The URL returns the GeoJson file but it isn't getting ...
3
votes
1answer
854 views

Openlayers: OGC Filter problem

I have a problem with OGC filter. My layer in OpenLayers has this filter: filter: new OpenLayers.Filter.Comparison({ type: OpenLayers.Filter.Comparison.BETWEEN, property: ...
3
votes
0answers
384 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 ...
4
votes
2answers
747 views

OpenLayers.Filter.Comparison.LIKE doesn't filter special characters!

it seems like OpenLayers.Filter.Comparison.LIKE doesn't filter special characters! for example, filter = new OpenLayers.Filter.Comparison({ type: OpenLayers.Filter.Comparison.LIKE, ...
2
votes
1answer
234 views

How to filter or query data in GRASS?

I have a PostGIS dataset with just over 2 million rows. Each row has a PostGIS geometry point value and several attributes. I'd like to do some analysis on certain subsets of the data, but I can't ...
3
votes
2answers
998 views

OpenLayers spatial filter polygon problem

I've got a dataset of English Counties (currently cut down for testing) that I'm serving from SQL 2008 using MapServer and OpenLayers. The features in my dataset are appearing in the right location on ...
7
votes
2answers
364 views

Using ArcGIS to filter cells where 7 or 8 of the neighbors are different

I have land cover data that I would like to clean using some generalization tools. Majority filter does almost exactly what I want, but is missing one key option. Majority filter allows you to change ...
1
vote
1answer
669 views

Openlayers - Vector Layer - Combining hide/show features using style property

I am trying to filter vector layer features according to their attributes. I have 4 check boxes: type_1, type_2, shape_1 and shape_2 Note that I am using Extjs for interface. at beginning I could ...
1
vote
1answer
633 views

OpenLayers / Mapserver WFS Filter: <gml:null>missing</gml:null>

I'm trying to filter features in OpenLayers when moving a JQueryUI slider. It works like this: EDIT: full files available here on GitHub. JQueryUI slider When moving the slider cursor, minSelection ...
1
vote
2answers
347 views

How can I tell mapserver to ignore a filter that is set in a mapfile?

How can I tell mapserver to ignore a filter that is set in a mapfile? I am displaying a wms layer with point features using mapserver. In one of the layers in my mapfile I have defined a filter ...
1
vote
3answers
2k views

How to show vector features in OpenLayers after hiding it?

I did change some vector features style (through check-boxes) using style property : var features = layer.features; for( var i = 0; i < features.length; i++ ) { //features[i].style = { ...
2
votes
1answer
119 views

spatial data filtering without GIS?

I have access to a database here (description of the columns are also available) containing spatial data in text format and with WGS84-EPSG:4326 coordinates. I would like to only select data in my ...
0
votes
0answers
48 views

QGis Smooth Raster DEM [duplicate]

Possible Duplicate: Raster generalization - buffers in rasters, expand pixels? I have a 1m LIDAR DEM which I'm manipulating in QGIS. I'd like to smooth the DEM, such as by having each ...
4
votes
1answer
231 views

Given a known batch of mobile-obtained gps data with timestamps, what algorithms can be used to clean it?

I'm working on the backend for an iOS/Android app that collects locations every hour and syncs with the server every three hours. The mobile apps themselves are not under my control and so I can't ...
1
vote
1answer
592 views

Having difficult time to implement a Rule using OpenLayers.Filter.Function

I'm trying to set up a Rule using the Function Filter. But it does not work: the lines on that layer are just black. And more importantly, the filtering function is never executed. Can someone please ...
1
vote
2answers
1k views

Passing selected polygon to INTERSECTS filter in a WFS request

In the code below, <ogc:Filter> <ogc:Intersects> <ogc:PropertyName>the_geom</ogc:PropertyName> <ogc:Function name="querySingle"> ...
0
votes
1answer
510 views

GeoServer: Cross Layer Filtering vs Layer Groups

To pull features using WFS from several layers in one request, I have two options: One, create a layer group, and then get features from the layer group, as opposed to individual layers. Two, use ...
2
votes
1answer
759 views

Filtering a loaded kml file in OpenLayers

I'm trying to create an interactive search engine (for finding event tickets) of which one of its features is a visual map that shows related venues using OpenLayers. I have a plethora of venues ...
6
votes
1answer
574 views

PostGIS query vs QGIS filter

I have a PostGIS dataset with around 3 million shapes. I only need to view about 1,500 of these shapes at any given time, but the shapes I need to see depends on which feature is selected in a ...
2
votes
1answer
777 views

Filtering a raster by pixel value ? (Qgis)

I have downloaded Globcover data in GeoTIFF format. I want to create a new grid which only has values where the Globcover data (the only band in the TIF file) has one certain value (==190). Can I do ...
2
votes
1answer
382 views

Filter Points Layer by Polygon Layer

I come from the Java world and go straight to C# and ArcGis 10 (I have to make a simple task for the university). So this means I don't really know much of C# but I can live with it and don't know ...
3
votes
1answer
3k views

How to filter features in a layer?

I am trying to display certain features in a shapefile-based layer using QGIS. I have found the subset function in the properties panel, which does exactly what i want, but is too tedious given that I ...
2
votes
2answers
1k views

GeoMedia WebMap with WFS 1.1.0 Filter Examples?

I'm having problems forming a GET query for WebMap spatial data using WFS 1.1.0. My query looks like this: ...
2
votes
1answer
412 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: ...
2
votes
3answers
4k views

OpenLayers WFS protocol: work with filters if the protocol is defined out of layer constructor

follow question:wfs-load-feature-check the scenario is: i am trying to load a WFS layer, since it takes a while to load all features, I want to give user a notice while waiting for response. the ...
2
votes
2answers
179 views

Query/find features in ArcPad, hide the rest in map?

Trying to help out another department that does quarterly assessments of field data. Their symbology is all set by the status of the assessment (the only way I could figure out how to hide something ...
1
vote
2answers
458 views

How to use the SLD Filter “Difference”

I have a postgis table with polygon geometries. I would like to create an sld which first does an inside buffer, and then a difference between the buffer and the original geometry. This is basically ...
4
votes
2answers
979 views

What is the best approach to using IQueryFilter.WhereClause in ArcObjects?

What is your preferred / best approach to using IQueryFilter.WhereClause statements in ArcObjects (e.g. when selecting features by attributes)? You need to check the source type (shapefile / personal ...
6
votes
1answer
1k views

How to filter wrong GPS readings?

I have absolutely no experience with GIS, it just so happens that one of the hobby projects I am doing at the local hackerspace includes tracking a model boat with a GPS... I hope this is the right ...