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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3
votes
2answers
22 views

Filtering Overpass-API by country

Does anyone know how to perform a overpass-api request like this? "Show me all banks in Germany"? I could just show all 'amenity = bank' in a specific bounding-box. But Germany (or most of all ...
0
votes
0answers
6 views

Using CQL to query Multiple WMS layers? [duplicate]

I have two WMS layers, one with points which lie on a state map. I want to use cql to display a particular state and points on it ..when I separate the queries with a semicolon (ex ...
0
votes
0answers
57 views

MapServer/WFS with filter doesn't return result

I'm using MapServer version 6.4.1 with PostGIS for my GIS app. When querying a property through 'REQUEST=GetFeature' MapServer returns all the expected data correctly, but if it's set a simple filter, ...
2
votes
0answers
18 views

How to select points as geomtry in QGIS when both multipolygons and points are stated within the wfs-server?

I'm trying to show data from the following server in QGIS: h ttp://geodata.nationaalgeoregister.nl/bag/wfs? I made a filter on the data I would like to appear in my map. This is how I stated the ...
1
vote
2answers
37 views

Display only the features containing a name

I used QGis to open a shapefile with the rivers in my state (Rio Grande do Sul, Brazil). I would like to know "the name of every river", but when I click on the rivers, most of the small ones don't ...
0
votes
1answer
25 views

SQL in CartoDB to select using OR more efficiently

I made this map a CartoDB map to to show the countries that have banned their citizens working as maids in the Gulf states, I also want to show the Gulf states as one colour. I created this SQL ...
0
votes
0answers
23 views

How to create a query dialog with MapBox JS?

I like to have a query dialog in the map in order to filter data according to specified fields and attributes selected by the user. Example: user may want to select a state via a dropdown menu and ...
1
vote
0answers
9 views

QGIS Raster moving when Majority filter

I'm running QGIS 2.01 Dufour on Linux Mint. Data & project are WGS84. I'm trying to smooth a grid & following other posts here I've used the Majority filter. This is looking helpful, but the ...
2
votes
1answer
55 views

Filter query error in QGIS2.4 or 2.6

I get this error when undertaking in query in QGIS2.4 or QGIS2.6: An error occurred when executing the query. The data provider said: OGR[3] error 1: Unrecognised field name ...
4
votes
1answer
99 views

Getting feature at point in C#

I want to get the feature at where mouse was clicked in map. So I was wondering how to get features which intersects with that point. Plus I was wondering how can I check what type of object it is ...
2
votes
0answers
33 views

SLD question regarding filter

I had a problem with my SLD today, I actually solved my issue but i'm very curious if there's another way around it, Mainly because my method is a hassle and may not work in other situations. I've ...
0
votes
2answers
99 views

Change marker color based on GeoJSON filter in Leaftlet

This is what I would like to do: Display all features of a GeoJSON file using Leaflet. Provide a text box where a property can be entered, if any of the GeoJSON properties match with what is entered ...
2
votes
0answers
38 views

How to Use GetGeomtype Gdal Python

I am just wondering what I am doing wrong when trying to use the GetGeomType. I need to focus on separating layers from a pix file. Two categories are the bitmaps(which are vectors) and then the ...
1
vote
1answer
29 views

What do cartocss attachments along filters mean?

I'm exploring openstreetmap-carto style and I wonder what does such syntax mean: [natural = 'water']::natural, [landuse = 'reservoir']::landuse, [waterway = 'riverbank']::waterway Is this ...
1
vote
2answers
175 views

GDAL/PYTHON: Batch Process Project All Level 2 HDF Files Only(Filter) and save to new directory

I have downloaded numerous hdf files from an ftp site. Let's say I already have 500 hdf files, 250 of them were level 1 hdf files and the rest were level 2. The level 1 format is: ...
1
vote
1answer
113 views

How works Openlayers GetFeature Filter strategy

I want to select on map that "res_id = 182" but that is selecting all objects on the map. var filter = new OpenLayers.Filter.Comparison({ type: OpenLayers.Filter.Comparison.EQUAL_TO, ...
1
vote
1answer
51 views

featureId filtering in wfs openlayers

I want to define a featureId fiter for wfs layer like below: wfs = new OpenLayers.Layer.Vector("WFS Vectore", { strategies: [new OpenLayers.Strategy.BBOX(), saveStrategy], projection: ...
0
votes
2answers
36 views

Can't figure out wfs url filter - what am i doing wrong?

I'm trying to figure out how to use the filtering function on a WFS layer. Anywhere I look, there is not an example of the xml AND the query alongside it explaining how it works. In the url query ...
2
votes
1answer
42 views

How to filter out osm data made by specific users - osmosis or a better suggestion

I am trying to find the code for a query in osmosis that will allow me to download only contributions made by certain OpenStreetMap users. I was thinking to use osmosis to filter out all the ...
2
votes
1answer
60 views

Filtering MSSQL layers in QGIS doesnt work

In my QGIS Plugin I am filtering layers with this Python code: FeatureIterator = layer.getFeatures( QgsFeatureRequest().setFilterExpression ("Fieldname='SomeValue'") ) for feature in FeatureIterator ...
0
votes
1answer
72 views

How to insert a feature using WFS-T based on a criteria?

I am pretty new to WFS/WFS-T and need help with some suggestions on how the following requirement can be implemented. We have a need to insert a feature into a PostGIS database based on the following ...
1
vote
1answer
60 views

QGIS Filters and Queries

In QGIS is there a way to filter a layer using the Query Builder to show all values which include a particular phrase. For example I have a list of organisations and I want to filter all those which ...
2
votes
2answers
303 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
2answers
113 views

Filter OSM files with Osmosis

I have to filter the whole Malta dataset with Osmosis only considering cycleways, footways (including used nodes of those ways) and all nodes with the tag value tourism and amenity. I write the ...
1
vote
1answer
38 views

QGIS: Turning Filter On and Off

When a filter is applied to a layer the layer cannot be edited. Is there any way of quickly turning the filter on or off without entering the Query Builder dialog box and removing the filter?
0
votes
0answers
25 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 aplicación en C++ que ...
0
votes
0answers
31 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 ...
1
vote
0answers
27 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
1answer
82 views

How to filter data by category, then map only maximum-value row for each?

I'm building a consolidated map of all transit systems in my area in QGIS. I have a GTFS dataset of bus lines, and it includes shapes for every trip on every route in the system (as it should), but ...
0
votes
0answers
65 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 ...
1
vote
1answer
98 views

PostGIS views vs WFS Filtering operations on PostGIS table

In what use cases should I prefer writing PostGIS views for filtering datasets versus filtering with WFS filter encoding operators and vice versa? In both cases I would be serving the data via ...
0
votes
1answer
61 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
363 views

WFS 2.0 with bbox filter and attribute filter

I am trying to get the following WFS GET request to work: wfs = "service=WFS&version=2.0.0&request=GetFeature", name = "&typeName=storeName:layerName", bboxFilter = '&bbox=' + ...
1
vote
2answers
120 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
57 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
103 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
188 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
96 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
54 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
vote
2answers
179 views

Where can i use a sieve filter?

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. Thank you
0
votes
0answers
29 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
22 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. ...
2
votes
2answers
1k 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
186 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 ...
0
votes
1answer
89 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
1answer
499 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
60 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
0answers
66 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
2answers
161 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
148 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. ...