on February 14, 2023
Preconditions not working on second iteration of ModelBuilder?
Geographic Information SystemsHow do I add a precondition in model builder? Open the tool by double-clicking the tool, or right-clicking and clicking Open. Click the Properties tab, then click the Precondition drop-down arrow to select the variable. You can add multiple preconditions if needed. When you click OK, a precondition connector line appears between the variable and
on February 14, 2023
Change maxZoom level on Leaflet Marker Cluster Group?
Geographic Information SystemsHow do you set max zoom in leaflet? To enable it, use the map’s zoomSnap option. The zoomSnap option has a default value of 1 (which means that the zoom level of the map can be 0 , 1 , 2 , and so on). If you set the value of zoomSnap to 0.5 ,
on February 13, 2023
How to get the census block corresponding to coordinate (longitude, latitude)?
Geographic Information SystemsHow do you find the longitude and latitude of a coordinate? Get the coordinates of a place On your computer, open Google Maps. Right-click the place or area on the map. This will open a pop-up window. You can find your latitude and longitude in decimal format at the top. To copy the coordinates automatically,
on February 13, 2023
QGIS Plugins PIP extension
Geographic Information SystemsHow to install pip in QGIS? Installing Python packages in QGIS 3 (for Windows) Open OSGeo4W shell (packed with QGIS in the start menu) Type py3_env . This should print paths of your QGIS Python installation. Use Python’s pip to install the library of your choice: python -m pip install {your library} How to
on February 13, 2023
Leaflet draggable Zoom Control
Geographic Information SystemsHow do you add zoom control in leaflet? Zoom − By default, this control exists at the top left corner of the map. It has two buttons “+” and “–”, using which you can zoom-in or zoom-out the map. You can remove the default zoom control by setting the zoomControl option of the map options
on February 13, 2023
Set size of points independent from map scale
Geographic Information SystemsWhat is the relationship between map scale and resolution? Data resolution is the smallest difference between adjacent positions that can be recorded. Since a paper map is always the same size, its data resolution is tied to its scale. Resolution also limits the minimum size of feature that can be stored. How do I set
on February 13, 2023
Do Navigation Apps Shrink the Hippocampus?
Geographic Information SystemsHow does hippocampus help with navigation? The hippocampus is a seahorse-shaped structure that resides deep in your brain and functions like an internal GPS. It helps us figure out where we are, if we’ve been there before, and where we should go next. Does habitual use of GPS negatively impact spatial memory? Rebecca Solnit points
on February 13, 2023
QGIS 2.10 for OS X dos not start on OS X 10.9.5
Geographic Information SystemsIs QGIS compatible with Mac? QGIS is available on Windows, macOS, Linux, Android and iOS. How do I update QGIS to the latest version? Quote from video: Search for the osgo4w shell in your start menu here you also see the qgis versions that i've already installed. Now you click on os geo for w
on February 13, 2023
V.distance.buffer does not create proper buffers with flat endcaps
Geographic Information SystemsWhat is a distance buffer? Buffer distance means a specified distance between an actual point of reuse of reclaimed water and a land feature or resource use specified in this chapter, such as public/private wells, adjoining property, inhabited dwellings, or other features as specified by the Department. What are the different types of buffers in
on February 13, 2023
Problem with Georeferencer not scaling TIFcorrectly
Geographic Information SystemsHow do you verify if your data is properly geo referenced or not? It exists different options, but the easiest way is to overlay the map in Google Earth. Check first if the map is georeferenced. Click Map -> Set Scale and Coordinate System and check if the Real-world coordinates and the Coordinate system are