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.
1
vote
1answer
33 views
Python - GDAL: spatial filter
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, ...
1
vote
0answers
20 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 ...
3
votes
0answers
58 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
30 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
0answers
89 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
16 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
66 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
102 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
48 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
95 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
96 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
85 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 ...
0
votes
0answers
31 views
Selective rendering of features in a WFS layer
I wish to show only specific features on a WFS layer dynamically based on an user input( say the distance to be travelled from a point). Kindly suggest me something.
cheers,
milon
3
votes
1answer
314 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
134 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 ...
3
votes
2answers
221 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
117 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 ...
1
vote
1answer
116 views
Is it possible to filter points that dont make sense compared to neighbour points?
I have a point shape (10.000 Points). Before interpolating theses points I need to filter them with a statistical background. Is there a tool or something I could use? Is it possible to select / ...
3
votes
2answers
525 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 ...
0
votes
0answers
159 views
Openlayers WFS Features returned but not drawed
I've managed to get features return by a WFS filter layer but I can't add them on top a google map layer.
var map, Geographic, Mercator, wfsLayer;
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
...
7
votes
2answers
129 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
189 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
265 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
106 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
2answers
384 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
90 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
30 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 ...
0
votes
0answers
91 views
Using an xml based filter with openlayers
I have been trying to figure out how to send a filter to geoserver using wfs.
The filter that I want to send is:
filterXML = '<Filter>'+
...
3
votes
1answer
120 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
313 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
488 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
229 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 ...
1
vote
1answer
450 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
332 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 ...
1
vote
1answer
344 views
Filtering a raster by pixel value with GDAL
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
214 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
696 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
668 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
0answers
287 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
3answers
2k 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
98 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
289 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 ...
3
votes
2answers
467 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
648 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 ...
3
votes
2answers
2k views
OpenLayers: Combine multiple OGC filters
I have two OGC filters client side:
<ogc:Filter xmlns:ogc="http://www.opengis.net/ogc">
<ogc:PropertyIsEqualTo matchCase="true">
...
4
votes
3answers
2k views
How to properly utilize DWITHIN Spatial Filter in OpenLayers
Given the following code:
var points = [];
points.push(new OpenLayers.Geometry.Point(-110, 38));
points.push(new OpenLayers.Geometry.Point(-108, 40));
var lineString = ...
3
votes
1answer
652 views
Case Insensitive WFS Attribute Search with ArcGIS Server?
I'm using ArcGIS 9.3.1 to host WMS and WFS services.
I have a map (.mxd file) with a layer whose attribute table includes fields with mixed-case string data. When I open this map in ArcMap and ...
2
votes
1answer
351 views
How to query some properties of a list of typenames in geoserver
I want to query selected propertynames from a list of Typenames in Geoserver.
I could find an example from OGC WMS 1.1.0 Implementation Specification ( pdf document page 80 Example 10) which is not ...
2
votes
1answer
428 views
Is there any way to perform spatial filter on multiple layers together?
I have a scenario where a featureclass[Child Version] is queried for some overlapping features on [SDE.DEFAULT] Version using ISpatialFilter, After getting few result, these features are looped and ...
11
votes
2answers
2k views
How to filter big datasets in Geoserver WMS?
Is there a good way to filter datasets with approx 50,000 features in Geoserver? I'd have to select between 100 and 200 features based on ids. These ids are different from the FeatureIds. Couldn't ...
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