on February 16, 2023
Query a QGIS server WMTS using a RESTful URL as defined by the OGC
Geographic Information SystemsIs QGIS OGC compliant? QGIS supports WFS 1.0. 0, 1.1. 0, 2.0 and OGC API – Features (OAPIF), including editing (through WFS-T). In general, adding a WFS layer is very similar to the procedure used with WMS. What is OGC in Qgis? The Open Geospatial Consortium (OGC) is an international organization with membership of more
on February 16, 2023
Classifying above ground LiDAR points in ArcMap?
Geographic Information SystemsHow do you classify LiDAR data in Arcgis? Lidar points can be classified into a number of categories including bare earth or ground, top of canopy, and water. The different classes are defined using numeric integer codes in the LAS files. What is ground classification in LiDAR? Ground classification is a preprocessing step to segment
on February 16, 2023
How to calculate Multispectral Vegetation Indices using Python
Geographic Information SystemsHow do you calculate vegetation index? It is calculated by taking a ratio between the difference of reflectance from NIR and Red bands and the sum of reflectance from NIR and Red bands. How to calculate NDVI in Python? Calculate NDVI in Python import os import matplotlib.pyplot as plt import numpy as np import rioxarray
on February 16, 2023
Saving Virtual Layer to temporary layer
Geographic Information SystemsHow do I save a temp layer in QGIS? If you wish to save a copy of a Temporary layer so that you can use it later or email to a colleague, then you can simply right click on the layer in the Layers Panel and choose Make Permanent. How do I save a virtual
on February 16, 2023
Generating polygons from centroids with rotation and dimensions
Geographic Information SystemsWhat is the centroid formula for polygons? The centroid (a.k.a. the center of mass, or center of gravity) of a polygon can be computed as the weighted sum of the centroids of a partition of the polygon into triangles. The centroid of a triangle is simply the average of its three vertices, i.e., it has
on February 16, 2023
How to access attributes from linked tables (QGIS 2.14.2 Essen)
Geographic Information SystemsHow do I search for attributes in a table in QGIS? For a simple search by attributes on only one column, choose the Column filter ‣ from the menu in the bottom left corner. Select the field (column) on which the search should be performed from the drop-down menu, and hit the [Apply] button. Then,
on February 16, 2023
Choosing string from dropdown list rather than typing it into Python script tool?
Geographic Information SystemsHow do I set script tool parameters? To access script tool properties, right-click the tool, click Properties, and click the Parameters tab. To add a parameter, click the first empty cell under the Label column and type the name of the parameter. This is the name that will be displayed in the Geoprocessing pane and
on February 16, 2023
Opening CHIRPS’ NetCDF file in QGIS
Geographic Information SystemsHow do I open a netCDF file in QGIS? There are different ways to open a netCDF file in QGIS. Either click on the icon on the top left, as shown below, or drag and drop a file directly onto the map canvas. Choose a netCDF file (. nc), then click on the variable you
on February 16, 2023
How do I cluster by features in CartoDB?
Geographic Information SystemsWhat is clustering on a map? Geospatial clustering is the process of organizing a set of geographical features into groupings named “clusters”. Features inside a cluster are highly similar, whereas the clusters are as diverse as possible. Clustering’s purpose is to generalize and expose a relationship between spatial and non-spatial attributes. What is clustering significance?
on February 16, 2023
QGIS change line start and end point
Geographic Information SystemsHow do I change a line to a point in QGIS? Method 2 – QGIS Geometry Tool From the menu select Vector>> Geometry Tools>> Extract nodes. Set the following: The source layer to be the line file you wish to convert. The output file name and location. Click “Run” and the tool will create a