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

learn more… | top users | synonyms

0
votes
1answer
11 views

How to use SpatialOperator in filter expression in QGIS

In a python script I want to specify a request filter expression using a spatial operator. I am following the general syntax "field name" operator condition. For example: ...
0
votes
1answer
59 views

How to filter polygons in Leaflet using range slider

I have a map I'm working on with Leaflet that displays a choropleth of zip code-level data. One piece of functionality I would like to add is to allow users to use a range slider to filter out ...
2
votes
1answer
32 views

How to use spatial filter in PyQGIS?

I have a buffer and need to filter a multipoint layer (QGSVectorLayer) so that I would get only features intersecting the buffer. What I've found: a) setFilterRect() This doesn't accept polygon ...
2
votes
0answers
27 views

Are there methods of filtering gps-data with metadata?

In our project we captured GPS-tracks from a few electric vehicles in the timeframe of a year. In total we captured around 13000000 GPS-points this way. The captured data comes from electric powered ...
2
votes
0answers
48 views

QGIS Forms - Limit list values based on a previous field

Looking for assistance to set up appropriate configuration to enable drop-down lists values to be filtered based on a previous value. Basically, I have a 3-tiered categorisation structure to one of ...
1
vote
2answers
45 views

How to request paginated or filtered data from WFS 2.0?

I want to download a data set from a WFS 2.0 server via HTTP GET, with curl for instance. $ curl -X GET http://example.com/wfs/?service=WFS&request=GetFeature ...
0
votes
1answer
38 views

How to find out if a WFS instance supports filtering via CQL?

I am considering using Common Query Language (CQL) to add filter parameter to a HTTP curl query which runs against a WFS server. I found out that GeoServer supports CQL via WFS. Can I tell from a ...
1
vote
0answers
35 views

How to 'filter' a district by clicking on it in Leaflet?

I have created a basic layer of districts on a background google streetmap on QGIS. Using the qgis2leaflet plug in, I'm able to render a webpage of the same. I want the web product to be such that ...
0
votes
0answers
66 views

Filter geoJSON layer after it has been loaded

I'm declaring and defining a geoJSON layer first, like: var layer1 = L.geoJson(null, { onEachFeature: function(feature, layer) { ... } }); ..and then loading a CSV into it, like: ...
2
votes
1answer
23 views

Deleting only specific LiDAR points in QTM with Mensuration tool

I'm using Quick Terrain Modeler (QTM) 64-bit v8.0.3.4 - I have a set of LiDAR data that has some points that I want to delete, but due to their location it is hard (if not impossible) to delete them ...
0
votes
0answers
29 views

How to calculate the covariance matrix of an RTK GPS system?

I am currently working to integrate an RTK GPS system into a sensor fusion framework. The framework is based on an Extended Kalman Filter, which is why I need an accurate estimate of the measurement ...
1
vote
1answer
79 views

jquery range slider to filter geoserver layer attribute

i would like to apply with jquery range slider a filter to an attribute of a geoserver layer. I prepared the code for the shape topp:state, attribute PERSONS. How is it possible filter the PERSONS ...
3
votes
1answer
102 views

How do you classify unclassified pixels in a land cover geotiff tile?

While printing out the raw pixel values of a GEOTIFF land cover tile I found 90 % of pixels have normal values i.e. those that the documentation describes (8 bit integers describing a land cover ...
0
votes
1answer
37 views

Filter (no display) layers in GeoExt.LegendPanel with names LIKE some pattern

This works to avoid Basemap layers such as Google Maps and overlays such as WMS to appear in the GeoExt Legend Panel: var legendPanel = new GeoExt.LegendPanel({ border: false, filter: ...
0
votes
1answer
89 views

Getting the nearest point and applying attribute filter using Distance Matrix in QGIS

I have two point layers, one with 233 row, other with 1531. For every point in layer 1, I would like to get the closest point from layer 2, (ok simple enough, but here's a trick) that has the value of ...
0
votes
1answer
144 views

How to use filter encoding in a WFS query on MapServer?

I need to query this WFS public service http://wms.pcn.minambiente.it/ogc?map=/ms_ogc/wfs/Numeri_Civici_2012.map&service=wfs&request=getCapabilities The layer I need to query is this one ...
1
vote
0answers
47 views

SLD filter questions using the other two conditions

I would like to specify the color and size in accordance with the speed and scale. This is a step of respectively 10. <Rule> <Name>rotate_ps1-1</Name> ...
0
votes
0answers
93 views

Filtering noise out from bare-earth DEM with terrace fields?

I have a 1m bare-earth DEM, derived from LiDAR data, representing a terraced landscape. For the sake of any subsequent use of the DEM (e.g., least-cost path, cost surface analysis, and the like) I am ...
1
vote
1answer
105 views

Geoserver WMS Filtering: Clipping geometry against a polygon

My data set is a series of multilinestrings representing roads. During a WMS GetMap request, I want to specify a polygon and display only the portions of those roads that fall within the polygon. I am ...
0
votes
0answers
22 views

Can we use morphological filter in SAGA GIS for the generation of DTM

I have DSM generated from ERDAS LPS. I need to filter the DSM to get bare earth model using different filters. I tried using morphological filter in ENVI but the results are in grey scales, so i cant ...
0
votes
0answers
32 views

Like query with “singleChar” does not work correctly in OpenLayers.StyleMap

I am working on a GIS API, based on OpenLayers 2.13. I want to represent my data using WMS and Vector layers. Recently, I have started developing the support for LIKE queries in filters and in style ...
1
vote
0answers
18 views

To filter the wrong data of point positioning

I have collected GPGGA data by Novatel OEMV receiver in static single point mode. I have so much data (GPGGA format) and I want to get the static point axis by averaging all data. But some of the data ...
1
vote
1answer
189 views

Removing duplicate data using FME

There are three roadkill data sets from three different institutions. We are sure that a combined data set will have duplicates. The three institutions will probably record their data differently: ...
0
votes
2answers
64 views

Is there a way to use IN filters in OpenLayers?

Is there a way to use IN filters (like the IN operator from SQL) in OpenLayers 2? For example, let's say, I want a filter like this: city = 'Paris' OR city = 'London' OR city = 'Lisbon' In ...
1
vote
0answers
41 views

How can I get a remote village transportation network from openstreetmap?

How can I get such a remote village transportation network from openstreetmap? nodes represent remote villages links represents public transportation tools, like buses Something like that: It ...
1
vote
2answers
166 views

QGIS Rule Based Rendering

I am looking for an example of how to use the QgsRuleBasedRendererV2 to filter features of a layer based on an attribute value (0 or 1). Has anyone done this in Python or C++?
0
votes
0answers
12 views

opening modis ndvi data .tif in timesat 3.1 windows [duplicate]

my aim is to apply savitzky golay filter to MODIS ndvi data in tif format. how do i open them in timesat 3.1 in windows .i tried opening tif files in imageview but the app does nothing. please help . ...
1
vote
1answer
110 views

applying savitzky golay filter to modis ndvi data

I want to smooth the ndvi MODIS 16 bit integer data .tif for LULC classification . i have timesat 3.1 software on windows but i don't how to apply the SG filter . i am not that good in programming . i ...
0
votes
1answer
44 views

Filtering data in CartoDB

I try to filter multiple values in the same column in CartoDB. I then like to filter on another column. I do not manage to filter on multiple values in one column in the graphical interface (one ...
1
vote
1answer
33 views

Filtering GML data by attributes (not attr.value) on the server side for calling them with http protocol, Openlayers

Supposedely it is easy but I can't figure it out: How to get data from server (format: gml) which contains all features but not all of the attributes? I have really big data and it is important just ...
2
votes
1answer
161 views

New filter expression QGIS 2.8

I try the new filter expression with QGIS 2.8. I want to filter only the selected objects on a layer in my map. My expression is: import processing from qgis.core import * vlayer = ...
1
vote
1answer
141 views

How can i filter on ID's through WFS Post request?

I want to select a set of features from my GeoServer (its Running 2.0.0) and use a query using multiple ID's to get their values. For this i send XML in a post message to the Geoserver: ...
2
votes
2answers
185 views

Las dataset to raster with ground points only

I'm trying to make a raster from a las dataset. I want to only use points classified as ground, but I can't figure out how to do this. What I've tried is: Create las dataset from 2 .las files. ...
2
votes
1answer
159 views

How to apply a filter to multiple vector layers in QGIS?

I am trying to apply an attribute filter to multiple layers in QGIS at once. The filter is to be applied to .osm data brought in through PostGIS to QGIS. I have tried selecting multiple layers -> ...
2
votes
0answers
152 views

Leaflet filtering existing featuregroup

I have a leftleat map and i would like to filter the featuregroup i am displaying. exp_colJSON = new L.geoJson(exp_col,{ onEachFeature: pop_col, pointToLayer: function (feature, latlng) { ...
1
vote
2answers
54 views

Search/Filter capability in GIS

I'm a database administrator who's working with a new client who'd like to use a "search" or "filter" application with GIS. For example, he would like to search within his area of properties that are ...
0
votes
0answers
96 views

how do I keep only highway roads and their nodes using osmfilter?

I am trying to filter a map from openstreetmaps using osmfilter to keep only highways (tag k) and the nodes that are at the extremes of these road segments. I have read many posts in different forums, ...
1
vote
0answers
45 views

Filtering for slope using kernel size in ArcGIS Desktop?

I have problem in smoothing the slope derived from digital elevation model. I want to do filter for the slope <5 degree in 7 X 7 kernel size, 5-20 degree in 5X5 kernel and >20 degree slope in 3X3 ...
3
votes
1answer
61 views

How to remove spikes from grid in SAGA GIS? [duplicate]

I tried to get a grid by interpolating LAS file using Ordinary Kriging. But the product grid has many pixels which values strongly stands out from average surface - I mean one pixel sinks nad spikes. ...
1
vote
1answer
37 views

Filter shapefile layer in ArcPad 10.2

I have an ArcPad project that uses several Shapefile layers. How can I filter the features in one of those layers? According to my searches, I can only filter if it is an AXF layer. I'm happy to ...
1
vote
1answer
82 views

Filter Geocoder by Country

I'm trying to filter esri's geocoder for a specific country. I've had some success, but nothing works extremely well. I would have thought simply adding sourceCountry = "xxx" to the parameters of ...
4
votes
2answers
327 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
7 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
195 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
28 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
48 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
50 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
89 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
31 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
159 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 ...