on February 2, 2023
Adding a new CRS to QGIS 3.10 with custom coordinate reference system
Geographic Information SystemsHow do I create a custom CRS in QGIS? To create a new CRS, or modify an existing CRS: Click Settings | Custom CRS to open the Custom Coordinate Reference System Definition. Click Add new CRS button to add a new entry to the CRS list above. With the new CRS selected, we can set
on February 2, 2023
Determining if spatial reference Geographic or Projected using ArcObjects?
Geographic Information SystemsWhat is the difference between geographic and projected coordinate reference systems? What is the difference between a geographic coordinate system (GCS) and a projected coordinate system (PCS) anyways? Here’s the short answer: A GCS defines where the data is located on the earth’s surface. A PCS tells the data how to draw on a flat
on February 2, 2023
Joining table in ArcGIS Desktop but join field is greyed out?
Geographic Information SystemsHow do I join an attribute table in Arcgis? Joining attributes in one table to another In the table of contents, right-click the layer or table you want to join, point to Joins and Relates, then click Join. Click the What do you want to join to this layer? Click the field on which the
on February 2, 2023
How to download tile from Amazon’s Sentinel-2 service
Geographic Information SystemsWhere can I download Sentinel-2 data? All Sentinel-2 data are freely available from the Copernicus Open Access Hub. Users can download the data via https://scihub.copernicus.eu/. How do I download data from my Sentinel hub? Sentinels Scientific Data Hub Create a User Account. Go to Sentinels Scientific Data Hub. Select Your Area of Interest. Where is
on February 2, 2023
How to convert coverage (.adf) to shapefile?
Geographic Information SystemsHow to convert coverage to shapefile? Put all the coverage files in one folder, select all the ones you want to change into shapefiles, right click, export –> shapefile (multiple), then select the output folder and OK. It takes a while but it’s so easy! How do I open ADF files in Arcgis? ADF files
on February 2, 2023
Raster colormap setting in ArcMap not honored in GP tool
Geographic Information SystemsHow do I add a Colormap in Arcgis? Creating a color map (. clr) file Add a single-band raster dataset to ArcMap. Right-click the raster dataset in the table of contents and click Properties. Click the Symbology tab. Choose the Unique Values renderer. Edit the symbol color to the appropriate color for each value. What
on February 2, 2023
Tool to set the maximum shape area of drawn polygons [ArcGIS 10]
Geographic Information SystemsHow do I resize a polygon in ArcMap? 1. Click the Customize menu at the top of ArcMap and choose Customize Mode. 2.Use the Scale button: Start an edit session. Use the Select arrow to select the feature you want to adjust. Click on the Scale button. Hit the “F” key on your keyboard. Where
on February 2, 2023
Permanently change Table column order
Geographic Information SystemsHow do I change the order of columns in a table? Rearrange the order of columns in a table In Datasheet view, drag the selected columns horizontally to the position that you want. In Design view, drag the selected columns vertically to the position that you want. How to change column order in MySQL table?
on February 2, 2023
Spatial query st_contains postgis
Geographic Information SystemsWhat is the difference between ST_Contains and ST_Within? In colloquial terms, ST_Contains determines whether the first geometry given to it encloses the second geometry (whether the first contains the second). ST_Within determines whether the first geometry is completely inside the second (whether the first is within the second). What is the difference between ST_Contains and
on February 2, 2023
Gdal Translate Creating Non-Standard File from netCDF
Geographic Information SystemsWhat is the difference between gdal_translate and Gdalwarp? Fundamental difference is that gdalwarp can reproject rasters between different coordinate reference systems but gdal_translate can’t. With gdal_translate it is more straight forward to translate data between the supported raster formats gdal.org/drivers/raster/index.html. How to convert NC to TIFF? At the top of the screen, click on the