on December 25, 2022
Python equivalent of EE ‘require’
Geographic Information SystemsWhat is EE in Python? The Python API package is called ee . It must be imported and initialized for each new Python session and script: import ee. How to initialize Earth Engine in Python? First of all, run the following cell to initialize the API. The output will contain instructions on how to grant
on December 25, 2022
Minimum and maximum coordinates of a polygon in Earth engine
Geographic Information SystemsWhat are the minimum and maximum possible values for longitude and latitude for the planet? Latitude and longitude are a pair of numbers (coordinates) used to describe a position on the plane of a geographic coordinate system. The numbers are in decimal degrees format and range from -90 to 90 for latitude and -180 to
on December 25, 2022
What QGIS tool or plugin is equivalent to the ESRI “Near” tool?
Geographic Information SystemsIs QGIS similar to ArcGIS? QGIS is the lean and nimble open-source version of ArcGIS. Simpler than ArcGIS, it is perfect for small projects which use less data, and since it’s free, it’s ideal for organizations with leaner budgets. It’s compatible with ArcGIS, however, so QGIS users can still accept and work with ArcGIS-specific files.
on December 25, 2022
Pearson correlation of two 1D array in Earth Engine
Geographic Information SystemsCan Pearson correlation be used for ratio data? The Pearson correlation coefficient is used with interval or ratio data, hence option d) is correct. Can I use both Pearson and Spearman correlation? If you want to explore your data it is best to compute both, since the relation between the Spearman (S) and Pearson (P)
on December 25, 2022
ArcMap populate field with value from another dataset
Geographic Information SystemsHow do I calculate a field based on another field in ArcGIS? Procedure In ArcMap, right-click the selected layer in Table Of Contents, and select Open Attribute Table. In the attribute table window, create a new field. In the Editor toolbar, click Editor > Start Editing. Right-click the newly created field, and select Field Calculator.
on December 25, 2022
How to calculate Percentages of NDVI Classes
Geographic Information SystemsHow do you calculate NDVI change? NDVI is calculated with the following by dividing the difference of NIR and RED by the sum of NIR and RED. Essentially, healthy vegetation reflects a lot of NIR and absorbs most of the RED, while unhealthy vegetation reflects less NIR and less RED. How to calculate NDVI in
on December 25, 2022
Is starting names with numbers a bad data naming convention?
Geographic Information SystemsWhat is a poor file naming convention? File naming best practices: Avoid special characters or spaces in a file name. Use capitals and underscores instead of periods or spaces or slashes. Use date format ISO 8601: YYYYMMDD. Include a version number (Creamer et al. Can a filename starts with a number? A file name must
on December 25, 2022
Google Earth import terrain
Geographic Information SystemsHow do I import terrain into Google Earth? Add your terrain map image to the document by selecting the “File > Import” menu in the Mac version; tap on the “hamburger” button and choose “Import > From Photos” or “Import > From File” on an iPhone / iPad; click the “hamburger” button and select “Import
on December 25, 2022
Blank Vector Selection Dropdown in QGIS GRASS Plugin
Geographic Information SystemsHow do I use grass plugin in Qgis? Loading GRASS raster and vector layers Start QGIS. If not already done in a previous QGIS session, load the GRASS plugin clicking on Plugins ‣ Manage Plugins and activate. In the GRASS toolbar, click the Open mapset For Gisdbase , browse and select or enter the path
on December 25, 2022
How can I define a relationship between GTFS’ trips and calendar/calendar_dates tables?
Geographic Information SystemsHow does GTFS work? A GTFS feed is composed of a series of text files collected in a ZIP file. Each file models a particular aspect of transit information: stops, routes, trips, and other schedule data. The details of each file are defined in the GTFS reference. An example feed can be found in the