on February 5, 2023
How can I both resample and aggregate a raster using Terra?
Geographic Information SystemsWhat is the difference between resample and aggregate? Whereas resampling is used for changing the resolution of a dimension, aggregating reduces the number of dimensions in the data. Examples of summary statistics include the mean, maximum value, minimum value or values of specific quantiles of the dataset. What will happen when resampling of a raster
on February 5, 2023
Seeking highly customizable GIS platform?
Geographic Information SystemsWhat are the two types of GIS software? There are two basic categories of GIS software: commercial and open-source. Commercial GIS software involves a paid license of some kind, either through subscription or a one-time perpetual license. Open-source GIS software is free for anyone to use. What is the latest version of GIS software? The
on February 5, 2023
Opening *.lyr file in QGIS without access to ArcGIS for Desktop?
Geographic Information SystemsCan you open a .LYR file in QGIS? LYR files can be added to an ArcMap document to automatically load and style data in a single step. Within QGIS, the “QLR” file format offers an equivalent functionality. SLYR adds direct support for LYR files within QGIS, and adds tools for automated batch conversion of LYR
on February 5, 2023
Shapely’s unary_union very slow!
Geographic Information SystemsWhat does Unary_union do? Returns a geometry containing the union of all geometries in the GeoSeries . What does buffer do in shapely? Returns a GeoSeries of geometries representing all points within a given distance of each geometric object. See http://shapely.readthedocs.io/en/latest/manual.html#object.buffer for details. What is Hausdorff distance in shapely? The Hausdorff distance between two geometries
on February 5, 2023
Using custom shortcut keys in ArcGIS while table of attributes is active window
Geographic Information SystemsHow do I assign a shortcut key in Arcgis? Click the Keyboard button on the customize dialog box. Click the category containing the command you want to modify. Click the command to which you want to add a keyboard shortcut. Click in the Press new shortcut key text box and press the keys on the
on February 5, 2023
Assigning census block demographics to postal data (zip/zip+4)
Geographic Information SystemsWhat is zip code and CBSA? The CBSA is a 5-digit numeric code which identifies the Metropolitan Statistical Area or Micropolitan Statistical Area in which the ZIP code lies. For larger metro areas, this database also includes the Metropolitan Division (if any) in which the ZIP code lies. What is a valid US ZIP code?
on February 5, 2023
Creating Polygon from a Raster
Geographic Information SystemsHow do you turn a raster into a polygon? Procedure. Use the Raster to Point tool to convert each pixel to a point. Navigate to ArcToolbox > Conversion Tools > From Raster > Raster to Point. These points are later used to label polygons. How do you cut raster into a polygon shape? Here are
on February 5, 2023
ST_Intersects with multiple geometries
Geographic Information SystemsWhat does ST_Intersects do? Determines if two GEOMETRY or GEOGRAPHY objects intersect or touch at a single point. If ST_Disjoint returns TRUE, ST_Intersects returns FALSE for the same GEOMETRY or GEOGRAPHY objects. What is the difference between ST_Intersects and ST_Contains? ST_Intersects() This function determines whether or not two geometries share the same space in any
on February 5, 2023
QGIS Joined Layer not displaying points visible on pre-join layer (No Extent)
Geographic Information SystemsWhy are layers not visible in QGIS? Because feature classes can only be edited from one geodatabase at a time, only the feature classes in the selected geodatabase are visible when editing starts. Write access has not been granted to the geodatabase that contains the feature classes in need of editing. The layer is not
on February 5, 2023
Capturing data from OBD-II device?
Geographic Information SystemsHow do I get data from OBD2? To log OBD2 data involves 3 simple steps: Configure your OBD2 logger with a list of OBD2 PIDs. Connect it in your car via an OBD2 adapter to start logging. Extract the SD and decode the data via the free software/API. What information can be obtained from OBD?