Questions tagged [filter]

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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4
votes
1answer
76 views

How was this map made by qgis2web

I have a layer with some points and I want to publish it using qgis2web. I have seen some exampes where the legend can be filtered such as in this webmap: https://ukerc.rl.ac.uk/TOOLS/...
6
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4answers
257 views

Taking only the largest polygon from multi-polygon layer in QGIS

I have multi-polygon geometries in my file, and I want to take only the largest polygon within the multi-polygon geometry to further work with it. I tried using Geometry Tool Multipart to Single part, ...
1
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0answers
31 views

Populating all city names from WFS file of a state in a drop down using OpenLayers 6 [closed]

How can I populate all cities' names from a WFS file of a state in a drop down? I am using OpenLayers 6 as mapping Libraries. Here is my code to add a GeoJSON WFS layer. //Adding vector source layers ...
2
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0answers
20 views

Google Earth Engine (GEE): Using closing filter (Focal_max) on masked image

I am working on a script for flood mapping. I have created a watermask and now need to use two morphological filters with a window of 3x3 pixels, first a dilation filter that enlarges the water mask ...
0
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0answers
11 views

Mapbox - filters override each other

I'm creating a map based on this example: https://labs.mapbox.com/education/impact-tools/finder-with-filters/ In their example, they have two dropdown filters and one checkbox filter. I would like to ...
2
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1answer
37 views

Designing a Low Pass Filter

How can I design a similar Low Pass Filter as given below which takes into account only 4-connectivity and ignores the pixels that complete 8-connectivity?
0
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0answers
20 views

LPF and HPF filters in ENVI

Since we know about convolution filter in image processing, it is basically a matrix applied to an image and a mathematical operation comprised of integers and it works by determining the value of a ...
0
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0answers
24 views

Have a common filter via GET variable for multiple GeoJSON layers in QGIS

I have a Leaflet page, that fetches various GPS tracks and data from a website and filters the resulting GeoJSON files via HTTP GET variables. If you want to get the data just for one day, I can use ...
0
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0answers
15 views

Filtering duplicate features on mapbox vector tile source

I am using mapbox and have a vector tiles source. How can i filter out duplicate features in order to display only unique feature? I checked the expressions in the filter and i cannot see how can ...
1
vote
1answer
31 views

QGIS ODBC connection to mssqlserver returns only filtered data

I am connecting to an MSSQL database table which does not have a geometry type field, but has coordinates in separate columns. The ODBC connection works, but when I bring the table in to QGIS, it is ...
1
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1answer
46 views

Filter (query) OSM .pbf file in QGIS graphical modeler or Python (QuickOSM or related tools)

I would like to automate a simple operation in the QGIS graphical modeler or a simple Python script. add all line features from a .pbf file filter all features with certain values within a certain ...
0
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0answers
31 views

QGIS: Filtering aggregate returns different results with same value

I have a joined layer that was created from a one-to-many join between a vector layer with three attributes (lat, long, siteid) and a data layer that contains many columns with many entries possessing ...
0
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1answer
22 views

Query Items by Type

I'm having trouble with queries in my app. If you look at this page you'll notice the 'Search by Item' drop-down is blank and the 'Search by Category' displays 'Select one' by default. And when you ...
1
vote
1answer
31 views

Filtering Sentinel-5P from metadata on Google Earth Engine

I need a S5P image from a spesific date. Is there any way to filter image collection based on the metadata on GEE so the result is only from an image. I've tried something like: var collection = ee....
0
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0answers
23 views

Does QGIS support geographical filter in WMS GetMap request?

I have a layer in QGIS SERVER which I need to filter by adding a BBOX geographical filter. I know that QGIS Server supports a kind of CQL filter, as GEOServer does, as explained here: https://docs....
0
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0answers
22 views

Sentinel-2 remove images from image set with B10 above a value (remove cirrus)?

I've noted in Sentinel-2, some of my images in a collection appear hazy (and have B10 values > 50) yet the cloud coverage assessment shows no cloud/cirrus. I understand I can see the ...
0
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0answers
21 views

How to filter out/in from GroupLayer (hide/show)

Assuming I have the following groupLayer: var myGroupLayer = new L.layerGroup(); and I add it to my map: myGroupLayer.addTo(map); somewhere in my app I add some layer to myGroupLayer like: myOptions=...
1
vote
1answer
22 views

Filtering across image collections based on a minimum pixel value

I am using the MODIS Terra Continuous Vegetation Fields Global Yearly 250m dataset to derive PTC values for forests. For this, I need to filter pixels that have PTC values that are at least 10%. While ...
0
votes
1answer
70 views

Removing outliers from LiDAR point cloud using ArcMap

I have a city-wide LiDAR (LAS format) dataset that I'd like to clear of outlier points to process in ArcMap 10.7. I've identified the points using the Locate Outliers tool. How do I use the resulting ...
1
vote
1answer
28 views

Query Result message returns 0 rows but browser shows results

I am using the Layer filter tools in QGIS version 3.14.1 Pi. (Right Click on layer > Filter) The source data is a Mapinfo .tab-file on a Server. When I put in my filter query, "Field_name"...
0
votes
1answer
45 views

GEE filter image to month before specified date

I am using a for loop in GEE to loop over several years of data adding bands to an image (MODIS fire data). I am currently adding a band for the mean NDVI in the month the fire occurred and the ...
0
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0answers
53 views

Filtering layer in Query Builder with array from other layer using QGIS

I have the following situation using QGIS 3.4: 'Layer 1' with lines and a field ('Field X') and 'Layer 2' with points where values in a 'Field X' are available. Now I would like to filter all points ...
1
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0answers
30 views

Using various script forms in Linux QGIS 3.12

In the last few weeks, I have noticed that various script forms in QGIS (3.12, Linux Mint 19.3) have strange cursor behaviour. Spaces in scripts are unevenly represented on the screen. This is hard to ...
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0answers
12 views

How can I omit points when filtering OSM data with Osmosis

I am trying to get data for rivers/waterways around the world. I have downloaded the planet file from OSM (as well as a North America file from Geofabrik), and am trying to use Osmosis to filter out ...
0
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2answers
27 views

Atlas - Adding point coordinate icon

I have created an atlas for all countries in the world, and I would like to drop a pin to show the centre of the country (as attached). Is there a way to add these coordinates automatically such as in ...
0
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0answers
12 views

Google Earth Engine map of GHSL filter year

I would like to know how could be possible to filer only one year of the dataset of GHSL? var dataset = ee.Image('JRC/GHSL/P2016/BUILT_LDSMT_GLOBE_V1'); var builtUpMultitemporal = dataset.select('...
0
votes
0answers
58 views

Data Driven map - Atlas, How to automate the filter feature?

I have a Postgres data source that needs to be filtered from hundreds of records to a few records, each time a make a map. Is there a way to automate that, so that the atlas makes map pages for each '...
1
vote
1answer
75 views

Google Earth Engine: set band as property without reducing

I have a function that takes an ImageCollection and sets a mean value as a property for another ImageCollection. var DHW = HS_SSTA_7d.map(function(im) { var res = im.reduceRegion(...
0
votes
1answer
52 views

Reprojection issue in Image collection after Filtering using Google Earth Engine

I am trying to reproject an image collection, but it fails after I apply filtering by (space, time, and cloudy cover percentage)!? Here is the code: Map.centerObject(geometry); var S2_f = S2....
3
votes
1answer
42 views

'Use unfiltered layer' option in QGIS query builder

When you create a filter, a 'use unfiltered layer' option is displayed in the query builder window. I expected this option to allow the user to toggle between the filtered and unfiltered layer. It ...
0
votes
0answers
20 views

QGIS, 3D-view, Time Manager Plugin. How to update 3D-view automatically?

I have a set of polygons with values, and time information. I am able to set Time Manager plugin to work with the values also with 2.5D view. So every year with new value for polygon I have a higher ...
1
vote
1answer
73 views

Filtering Multiple Features in QGIS

How do I select multiple features in a vector layer using the Query Builder in QGIS? Using U.S. Census geographic data, I'm trying to select a large number of specific block groups using the GEOID ...
1
vote
0answers
24 views

Filter parent layer with child table in 1-N relation in QGIS

I have a layer with a related (1-N) table and I need to filter the parent layer with values of the child table. I have tried with the Query builder of the Provider feature filter in the layer ...
1
vote
1answer
65 views

Multiple GeoJSON filter based on properties in Leaflet by button — work with only first Property

I am trying to filter my geoJSON layer (school) based on those properties: Type ( primary - preparatory - high ) Time ( day - night - alltime ) Gender ( male - female ) What I need : After user ...
1
vote
0answers
43 views

Filter a QGIS report to get only selected features information

I have a layer with about 28000 points. What I'm trying to do is create a report showing just the information of the selected points, but looking at the report manager options I have not found an ...
2
votes
1answer
23 views

Selecting features based on great number of different values in the Attribute Table

I have many land parcels related to many different cities. I would like to select land parcels related to some of these cities only (about 20 of them). Is using LIKE/ILIKE + OR like below the only way ...
2
votes
1answer
74 views

Selecting two or more values (like two city names) in one column

In the attribute table I have a column with many cities and want to select rows that only contain these city names, like "Paris" and "London". I tried: "cityname" ILIKE '...
0
votes
1answer
23 views

Filter layer by using symbology as a toggle

Is there a way to customize ArcGIS Desktop 10.7.1 so that users can filter layers by simply clicking the layer's symbology in the table of contents?   For example, is there a way to add a toggle/...
3
votes
1answer
188 views

Way to filter outliers from point cloud in lidr?

I have an ALS point cloud. I have been able to successfully normalize the height, but am wondering if there's any way to remove/filter some points that are obviously errors/outliers (points below 0 ...
1
vote
1answer
20 views

Map not changing after filter

I use qgis 3.4.4 and I make a filter on vector layer. Here is my code: layers = QgsProject.instance().mapLayers() for layer_id, layer in layers.items(): if (layer.name() == "csv_points_acc&...
0
votes
0answers
73 views

Apply a date filter to the vector layer

I am new to developement in QGIS. I use a the 3.4.4 version of QGIS. My vector layer is like this: So I want to know how to filter this data by date and apply the changes in the GUI. Here is what I ...
0
votes
1answer
49 views

ArcGIS API for Python geometric filter of feature layer producing Runtime Error: 'geometry parameter invalid'

I am trying to select a handful of features from an Enterprise Portal feature layer using the ArcGIS API for Python. Specifically I am trying to do a spatial selection, where the selected features are ...
0
votes
2answers
60 views

Not working formula in Query Builder (Filter)

I have been trying to filter a big dataset based on multiple values. The idea is to extend the formula as put in the image below. But even the first part doesn't work. When I do: "...
1
vote
1answer
39 views

Selecting only CFSR images in Google Earth Engine with precipitation data

I am trying to create cumulative monthly composites of precipitation from CFSR data in Google Earth Engine (i.e. each image would be mm/month for each month) However, I realised that images ending ...
1
vote
1answer
71 views

Filter geometry based on map extent using OpenLayers

I need to summarize an attribute of a geojson based on the map extent. I want to sum values for all features intersecting bbox. I think that I must use the Bbox filter but isn't clear for me how I can ...
-1
votes
1answer
60 views

Select points at the end of a line [closed]

I have two layers in QGIS: "line" layer which consists of lines and multi-lines "Point" with points with attribute 'Code' How to write a efficient script in PyQGIS to find out ...
0
votes
1answer
29 views

Is there a way to filter results in the attribute table of a point shapefile by the extent of a second polygon shapefile in QGIS?

I am currently trying to temporarly filter data with in the attribute table to a confined area defined by a second polygon shapefile. The data set to be filtered consists of 100s of points that extent ...
0
votes
0answers
55 views

GeoServer WMS XML request with NamedLayer filter

I need to draw a map with some custom features I don't have in database. I found SLD query that allows me to do that (https://github.com/geoserver/geoserver/blob/master/data/release/demo/...
0
votes
1answer
117 views

How to mask PCA on Google Earth Engine

I am trying to perform PCA on MODIS imagery. I got my code to run using MODIS (it also worked for Landsat), but when I mask my MODIS collection the PCA fails. This had to do with missing values, as ...
0
votes
1answer
64 views

Filter same Value Map to show specific values in different columns in QGIS

I am using QGIS 3.12.2 on Windows 10. I have created one large table layer to use as a ValueMap for multiple columns in a project. I need each column to show only the relevant values. I have tried to ...

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