Mysterious Lat Long conversion to XY problem using QGIS
Geographic Information SystemsHow do you convert XY coordinates to latitude and longitude in QGIS? Toggle editing (ctrl-E) and open the calculator (ctrl-I). Select “create a new field”, call it “Longitude”, and make the expression $x. Do the same for a second new attribute called “Latitude” and make the expression $y. You should now have latitude and longitude
How can I project a raster DEM and not get serious distortion in the resulting DEM?
Geographic Information SystemsCan you project a raster? A raster dataset is projected into a new spatial reference using a bilinear interpolation approximation method that projects pixels on a coarse mesh grid and uses bilinear interpolation between the pixels. This tool guarantees that the error range is less than half a pixel. How do you give a raster
Benefits of *.las vs *.xyz or *.ascii when working with LiDAR in ArcGIS for Desktop?
Geographic Information SystemsHow do I view LiDAR data in ArcGIS? Procedure Create a LAS dataset. Double-click the LAS dataset. Click the LAS Files tab > Add Files. Open the LAS File Properties and Statistics window by clicking the button below the Statistics column. Click Calculate, and click OK. In the LAS Dataset Properties dialog box, click OK.
Measuring minimum distance between objects in two layers using ArcPy?
Geographic Information SystemsHow do I find the distance between two features in ArcGIS? The distance between two features is calculated as the shortest straight line connecting the points. ArcGIS Pro provides a few tools to calculate distance, including the Near, Generate Near Table, and Spatial Join (with CLOSEST match option) tools. How do you find minimum distance?
Finding matching field values between two layers in QGIS?
Geographic Information SystemsHow do I filter attributes in Qgis? Filtering In the Layers Panel, double-click on the layer you wish to filter. The Layer Properties window will open. Click on the General tab. Go to the Query Builder at the bottom right and click on it. You can now enter a Query. Click on OK and then
What are the advantages / disadvantages of reporting location in decimal degrees versus degree min sec?
Geographic Information SystemsWhat is the difference between decimal degrees and degrees minutes seconds? One degree has 60 minutes and one minute has 60 seconds. If you have 91.456 degrees you can see that your measurement is 91 whole degress plus 0.456 of a degree. To state the decimal 0.456 degrees in minutes multiply 0.456*60 to get 27.36
Merging two data sets (multiple satellite images) based on their names using ArcPy
Geographic Information SystemsHow do I combine two image datasets in Python? Merging two images Create an empty image using the Image. new() function. Paste the images using the paste() function. Save and display the resultant image using the save() and show() functions. How do I merge satellite images in Arcgis? To use this function, you need to
Loading multiple GPX files at once?
Geographic Information SystemsHow do I combine multiple GPX files? merge all open GPX files as tracks into one file, or export them separately.To merge two GPX files: Below the bottom panel, select the tab of the first GPX file you want to merge. Click on (available only when more than two files are open). Click on the
What’s the easiest way to generate many attribute-based depictions of the same layer?
Geographic Information SystemsHow do I increase the size of a point in Qgis? Click “Configure Symbol” in the pop-up window. In the “Symbol Settings” window make sure Marker is highlighted (it should be, by default). Then go to the “Data Defined Override” to the far right of Size. Hover over “Field Type” then select the field you
How to write an Advanced Query which gets the same results as the simple query option
Geographic Information SystemsHow do you use the result of one query to another query? Use the results of a query as a field in another query. You can use a subquery as a field alias. Use a subquery as a field alias when you want to use the subquery results as a field in your main query.