on January 24, 2023
Random Forest out of the bag and confusion matrix
Geographic Information SystemsWhat is out-of-bag in random forest? The out-of-bag (OOB) error is the average error for each calculated using predictions from the trees that do not contain in their respective bootstrap sample. This allows the RandomForestClassifier to be fit and validated whilst being trained [1]. What is confusion matrix in random forest? The confusion matrix contains
on January 24, 2023
Returning current attribute name in QGIS Expression Dialog
Geographic Information SystemsHow to use expression dialog in QGIS? Double-clicking an item adds it to the expression editor. A help panel displays help for each selected item in the function selector. Press Ctrl + Click when hovering a function name in an expression to automatically display its help in the dialog. Display the list of All Unique
on January 24, 2023
Compute weight value based on other attributes?
Geographic Information SystemsHow do you calculate your weight with different marks? Multiply Grade by Weight Multiply the grade on the assignment by the grade weight. In the example, 85 times 20 percent equals 17 and 100 times 80 percent equals 80. How do you calculate weighting factor? The weighting factor is calculated by the total calls of
on January 24, 2023
Definition of the WGS 84
Geographic Information SystemsWhat is WGS84 and explain? The World Geodetic System 1984 (WGS84) is a datum featuring coordinates that change with time. WGS84 is defined and maintained by the United States National Geospatial-Intelligence Agency (NGA). It is consistent, to about 1cm, with the International Terrestrial Reference Frame (ITRF). What are the dimensions of WGS84? The WGS 84
on January 24, 2023
Seeing place names in Google Earth Pro?
Geographic Information SystemsWhy isn’t Google Earth showing place names? First off, ensure that you have zoomed in enough. Some street names will not show on the map unless you zoom in enough. This is because Google maps do not allow the street labels to overlap so the space for the street name can only be enough if
on January 24, 2023
Finding new features in new QGIS version?
Geographic Information SystemsHow do I see features in QGIS? Open Attribute Table button in the Attributes toolbar. This will open a new window that displays the feature attributes for the layer (figure_attributes_table). According to the setting in Settings ‣ Options ‣ Data sources menu, the attribute table will open in a docked window or a regular window.
on January 24, 2023
Changing colors of edit fields in attribute table?
Geographic Information SystemsHow do I edit a field in attribute table? Note: Click the Editor menu on the Editor toolbar and click Start Editing. Right-click the table or layer in the table of contents and choose Open Attribute Table. Click the cell containing the attribute value you want to change. Tip: Type the values and press ENTER.
on January 24, 2023
Joining my spreadsheet data to my geodatabase file is not including all matching records
Geographic Information SystemsHow do I import an Excel spreadsheet into a geodatabase? Creating a database from a spreadsheet Start ArcCatalog. On the main menu, click Customize > Toolbars > Defense Mapping. Click the Geodatabase Builder button. If necessary, click the Excel to GDB tab. Click Select XLS. Browse to the Excel file to be used to build
on January 24, 2023
Add Geometry Attribute
Geographic Information SystemsHow do I add geometry to Qgis? Very simple in QGIS, just go to the vector menu: vector | Geometry tools | Export/Add geometry columns, which will give you the following input screen: As you can see, you only need to add the path and name of the output shapefile and you are set.Share this:
on January 24, 2023
Create a mask out of a raster layer
Geographic Information SystemsHow do you make a raster mask? Binary Rasters Display an image that you want to mask. From the Toolbox, select Raster Management > Build Raster Mask. Select the input file and click OK. From the Mask Definition dialog menu bar, select Options > Import Data Range. Enter a minimum and/or maximum value in the