To show, hide, extract, or remove particular data from a larger set, narrowing it down, or the specific criteria used to do so.

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1
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2answers
448 views

Avoid NoData after Focal Statistics Majority

I am currently working with some classified land cover rasters (containing 8 land cover classes) in ArcGIS 10.0. I would like to make them look smoother and have therefore used the Focal Statistics ...
-1
votes
2answers
149 views

Using floating point raster image for majority filter in ArcGIS?

I'm trying to do filter images using Majority filter in ArcGIS. My input images is a float point raster image in .img format. There is an error saying "Invalid parameters". What does it mean?
0
votes
1answer
418 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/ . ...
1
vote
1answer
479 views

QGIS 2.2 - expression string builder to ignore NULL values

Simply put, I would like to create a rule-based filter whereby you add 2 columns together and you get a certain colour as a result. However, some fields in Column_1 may be NULL and those exact same ...
0
votes
1answer
307 views

how to filter point features based on the filterted polygons with OpenLayers

I have one WFS polygon layer and one WFS point layer. The polygon layer has an attribute user_id. The web map has two requirements. Filter the polygons based on the attribute user_id. That is, a ...
0
votes
1answer
114 views

filtering GeoRSSLayer contents in arcgis javascript API?

I would like to make use of a public geoRSS feed with content from 10years (200+ items), however since it is too much information, i would like to show only a subset of this content in my map... I ...
1
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2answers
823 views

Using sieve filter in ERDAS Imagine and/or ArcGIS for Desktop?

Where can i use a sieve filter for my supervised classification? Can i do it in Erdas Imagine or in ArcGIS? I can't find it anywhere.
0
votes
0answers
31 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 ...
2
votes
2answers
3k views

What class/types of smartphone chipsets support GPS, A-GPS, GLONASS AND have extended kalman filtering?

I've been testing several Android phones (all running Android 4+) Sony Xperia T, Moto G, Nexus and HTC 1 which are all giving decent tracks (all of which use GPS/GLONASS) However we are also using ...
1
vote
1answer
836 views

How to use paging in a WFS query?

I am running a GetFeature request against a WFS server which does not support to download all data at once. Can I use ogc:PropertyIsGreaterThanOrEqualTo to split the dataset into chunks at download ...
1
vote
1answer
214 views

Filter on a array of value in OpenLayers

I'm running into an issue. I have an array of value coming from a JSON POST. After retrieving these values and storing them into a var, I need to filter an OpenLayers layer with this values. I'm ...
1
vote
2answers
2k views

QGIS Advanced String Filter Expression returns too many results

"GNR" is a string column and I expect the filter expression "GNR"='.11' to only return the feature with the value '0.11'. Why are the other features with values of '.110'and '.1100' included? Is ...
1
vote
1answer
102 views

How to query data like only for point by from a grouplayer by using WMSGetFeatureInfo in Openlayers?

till now I have been known how to query data from a groupLayer by using WMSGetFeatureInfo while the point is it shows a lot of associate results features,so I aim to query a single layer infomation ...
0
votes
2answers
401 views

What is the bounding box of filtered features?

I'm using geoserver to store a number of gps tracks that are recorded during test drives with a number of vehicles. I have a layer defined that contains the following columns in the database: date ...
1
vote
1answer
423 views

MapServer: Default spatial filter

I have MapServer setup to display data (both WMS and WFS), however I'm having a problem adding a default filter. There's is an area on the map that users should not be able to retrieve features from. ...
0
votes
1answer
297 views

[mapserver]: layer filtering with layerObj.setFilter()

I'm trying to filter a layer (using mapserver) backed by a Shapefile using layerObj.setFilter() but this doesn't seem to have any effect on the returned tile(s). Sample code: layerObj = ...
2
votes
0answers
519 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 ...
6
votes
2answers
795 views

How to de-noise a DSM

I have created a DEM, DSM, and nDSM from a LiDAR Point Cloud using SAGA-GIS. I extracted the appropriate returns from the point cloud, then converted to grid, and then closed gaps to fill in any ...
1
vote
2answers
277 views

Filter out osm data that have been edited after some timestamp

I want to get data after some timestamp. I have downloaded the osm file of the area. I went through the osmosis documentation but could not find a way to filter it by time. The result should be same ...
0
votes
1answer
563 views

Geoserver: WFS/WMS query by month on Date datatype

I have a GeoServer running, using a Postgis database as storage for a workspace with a few different layers. These layers are accessible through WMS or WFS. One of the variables in this database is ...
0
votes
1answer
2k views

Use new OpenLayers.Filter.Logical from OpenLayers into jQuery

I've a small GIS app, displaying stations on a map. Very simple. At start, none of the stations are displayed, even if its layer is enabled. What I want, when I click on a div, is to display one the ...
2
votes
2answers
355 views

OpenLayers.Format.SLD - Ignores 'matchCase'?

I've trying to use OpenLayers to construct an SLD element to include in a WMS layer's parameters. This SLD document can contain a number of filters. This works fine and resultant SLD does work to ...
0
votes
1answer
152 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
145 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
2k 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
298 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
737 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
575 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
101 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
550 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
146 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
130 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: ...
3
votes
1answer
430 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, ...
1
vote
0answers
126 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 ...
10
votes
1answer
772 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
482 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
114 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
1answer
514 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
1k 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
118 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
426 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
567 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
125 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
1k 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
523 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 ...
5
votes
2answers
1k 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, ...
6
votes
1answer
3k views

Problem with WFS filters (BBOX, INTERSECTS)

I'm trying to get a feature/features from a small area using the BBOX (or INTERSECTS) filter in my WFS query. I should be expecting only a small set of features or a single feature and yet the query ...
2
votes
1answer
367 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
1k 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
710 views

Using ArcGIS to filter cells where 7 or 8 of 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 ...