Tagged Questions

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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2
votes
0answers
31 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
23 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
152 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
63 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
32 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
29 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
30 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
54 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
50 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
46 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
205 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
69 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
35 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
19 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 aplicaciĆ³n en C++ que ...
0
votes
0answers
29 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
24 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
72 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
51 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
72 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
52 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
249 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
83 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
49 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
78 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
164 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
72 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
45 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
141 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
142 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
73 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
396 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
54 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
59 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
139 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
121 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
136 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 = ...
1
vote
0answers
291 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 ...
5
votes
2answers
274 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
135 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
227 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
795 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
181 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
80 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
87 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
306 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
162 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
354 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 ...