Category: Geographic Information Systems

Reading rasters in r using terra package

How do I read a raster image in R? Raster files are most easily read in to R with the raster() function from the raster package. You simply pass in the filename (including the extension) of the raster as the first argument, x . What package is raster in R? raster: Geographic Data Analysis and

Is there a better way to convert Raster to Point data? Don’t need one point for every cell

How to convert raster to point in QGIS? Quote from video: You can find it under vector creation. And then there's a raster pixels to points in the dialog. We use our accessible wells layer as the input. And we can change the field name for the output. How to vectorize a raster? Place an

OpenLayers 3 measure example

How to use OpenLayers? Quote from video: And click on the quick start i'm on openlayers.org on the home page. And let's go ahead. And get that and now this is showing us basically how to put a map on a page. How do you draw lines in OpenLayers? Select a geometry type from the

PyQgis create labels

How do I create labels in Qgis? Turn on Labels in QGIS Right-click on the layer and select the properties option from the menu. Then click on Labels and set up the field you want to label on. Under rendering, make sure the “Show all labels” box is checked.  How do I add a road

Is it okay to do analysis on coarse rainfall data, since the area calculations can be highly misleading

Which method used for analysis of rainfall data? The literature shows several methods in identifying rainfall trends. However, statistical trend analysis using Mann–Kendall equation and graphical trend analysis are the two widely used and simplest tests in trend analysis. What are the common causes of inconsistency of rainfall records? Inconsistency would arise in the rainfall

V.clean cleaning topology

What is v clean in Qgis? clean – Toolset for cleaning topology of vector map.

ArcGis Cemetery Mapping

What is grave mapping? Cemetery mapping refers to the act of understanding the layout of grave sites and other elements within a cemetery and documenting those locations. Cemetery maps can be important for visitors who are seeking specific memorials or grave sites.  What is cemetery mapping and information system? Cemetery Mapping and Information System provide

Get the all coordinates (points ) inside a polygon boundery

How do you extract points from a polygon? Doing an intersect between the polygons and the points would “extract” the values into another point layer that you could join to and copy value to your points.  How do you know if coordinates are inside a polygon? Draw a horizontal line to the right of each

How can I reformat xml data with fme?

How to beautify XML? Then there are a couple keyboard shortcuts to beautify the XML: Pretty Print: Ctrl + Shift + Alt + B. Pretty Print (indent attributes): Ctrl + Shift + Alt + A. How to read XML file in FME? Step-by-Step Instructions Open FME Workbench. Open FME Workbench and create a new workspace.

Multiply Rasters with Scalar Numbers as Input in QGIS Modeler

How to do raster calculation in QGIS? To add a raster to the raster calculator expression field, double click its name in the Fields list. You can then use the operators to construct calculation expressions, or you can just type them into the box. In the Result layer section, you will need to define an

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