on February 15, 2023
Spatial reference for dummies?
Geographic Information SystemsWhat is meant by spatial reference? A spatial reference describes where features are located in the world. Most spatial references will be either geographic (using a geographic coordinate system) or projected (using a projected coordinate system). What are examples of spatial referencing? Common examples include the Universal transverse mercator (UTM) and national systems such as
on February 15, 2023
Why is “define projection” in ArcGIS not working on my GeoTIFFs? Problem with the extent?
Geographic Information SystemsHow do I fix ArcGIS projection? Answer Open ArcToolbox and select Data Management Tools > Projections and Transformations > Define Projection. Choose the appropriate coordinate system. You have to define it as what it is, not as what you want it to be. Once the projection is defined correctly, the projection can be changed.
on February 15, 2023
Converting KML file to layer on existing map in ArcGIS Desktop?
Geographic Information SystemsHow do I convert KML to layer in ArcGIS? Using the KML to Layer tool, select the KML layer from your Contents menu and drag it into the Input KML File parameter on the tool. After it has been converted, perform the geoprocessing operations on the new output. How to convert KML file to shapefile
on February 15, 2023
How should I implement a many-to-many relationship in a web mapping application?
Geographic Information SystemsHow do you implement a many-to-many relationship? For those relationships, you simply connect the appropriate fields with a line. To create many-to-many relationships, you need to create a new table to connect the other two. This new table is called an intermediate table (or sometimes a linking or junction table). What are the examples of
on February 15, 2023
Why does MapBox serve trasparent pixels only below a certain zoom level?
Geographic Information SystemsWhat is the zoom level limit on Mapbox? Mapbox provides maps in 23 zoom levels, with 0 being the lowest zoom level (fully zoomed out) and 22 being the highest (fully zoomed in). What are Mapbox tiles? Mapbox vector tiles are designed to visualize a large amount of data on a map in a scalable
on February 15, 2023
QGIS Modeler: Layer Rename does not output
Geographic Information SystemsHow do I rename a layer in Qgis? Quote from video: So what i'm doing i'm changing the names of the layers not the files to shorten names how to do that right click properties. Here you have under source you have the layer. Name in this case. Is there a model builder in Qgis?
on February 15, 2023
Cannot load vectorlayer PyQgis
Geographic Information SystemsHow to load layer in QGIS? If you have a georeferenced image or aerial imagery, you will need to import them using the Add Raster Layer button. To import a raster file, follow these steps: Click on the “Layer” menu, mouse-over “Add Layer” and click on “Add Raster Layer…” or click on the “Add Raster
on February 15, 2023
Pansharpening of atmospheric corrected image
Geographic Information SystemsWhat is Pansharpening in remote sensing? Pansharpening is a fusion technique to combine a panchromatic image of high spatial resolution with multispectral image data of lower spatial resolution to obtain a high-resolution multispectral image. During this process, the significant spectral characteristics of the multispectral data should be preserved. What is the process of atmospheric correction?
on February 15, 2023
Extract Multivalues to Points giving Error ?
Geographic Information SystemsHow to extract values to points in Esri? The Extract Values to Points tool extracts the cell values of a raster and creates a new point feature class. In ArcGIS Pro, click the Analysis ribbon, and click the Tools icon. In the Geoprocessing pane, search for and click Extract Values to Points. How do I
on February 15, 2023
How to solve ‘syntax error, unexpected LE’ in QGIS query builder?
Geographic Information SystemsHow do I enable query builder in QGIS? Open the Query Builder by opening the Layer Properties and going to the General menu. Under Feature subset, click on the [Query Builder] button to open the Query builder. How do I run a SQL query in QGIS? This will involve running an SQL query, then saving