Category: Geographic Information Systems

Black Exported TIFF file Google Earth Engine?

Why are my TIFF files Black? The TIFF image appears black as the palette of shades the computer screen has is way more limited than that of the TIFF image (256 levels per color on the computer screen versus 65536 levels per color in the TIFF file). Can I open TIFF in Google Earth? Select

Posting still running after nearly 4.5 days

What does it mean if a job posting is up for a long time? Sometimes a company keeps a job advertised for a long time (or forever) because they’re pretty much always looking for people who can do Role X (and have multiple slots for Role X on their staff) and when they find good

Get the coordinates of all points having the same given latitude along a line shapefile

How do I extract coordinates from a shapefile in QGIS? Quote from video: Just go to vector geometry geometry tools and export at geometry columns. How do I convert points to lines in QGIS? polylines in GRASS (available through QGIS) or the SAGA GIS tool Convert points to line(s) Available through the Processing Toolbox (

Covert Multipatches to Shapefile and back to Multipatch

How do I convert multipatch to polygon in ArcGIS? Use the 3D Analyst Tools –> Conversions –> “Multipatch Footprint” in ArcGIS. You’ll obtain a polygon shapefile with the original multipatch’s attribute table. Save this answer.  How do I turn a feature class into a shapefile? Export the feature class to shapefile using the Feature Class

Storing SRID:4326 data as Geometry or Geography?

What is the difference between geometry and geography data in PostGIS? PostGIS gives you a choice of two different ways to store geospatial data: Geometry, where it assumes all of your data lives on a Cartesian plane (like a map projection); Geography, where it assumes that your data is made up of points on the

Choosing CRS for metric distance calculations?

What is CRS in measurements? CRS provide a standardized way of describing locations. Many different CRS are used to describe geographic data. The CRS that is chosen depends on when the data was collected, the geographic extent of the data, the purpose of the data, etc. What is CRS in GIS? A Coordinate reference system

In QGIS are there similare construction tools to ArcGIS?

Are QGIS and ArcGIS similar? 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. 

Interacting between Openlayers and Python

Is OpenLayers an API? OpenLayers is an open-source (provided under the 2-clause BSD License) JavaScript library for displaying map data in web browsers as slippy maps. It provides an API for building rich web-based geographic applications similar to Google Maps and Bing Maps. Is OpenLayers API free? OpenLayers has been developed to further the use

Using in_memory in Python deletes values in field – Arcgis 10.4.1

How to clear memory in Arcpy? To clear the Display Cache, on the ArcMap Toolbar, go to Customize | ArcMap Options: Then use the Display Cache Tab to manage the Display Cache Memory. If the “Currently Used:” is reporting more than a gigabyte or so, use the “Clear Cache” button to clear the memory. What

ArcGIS Server Geoprocessing service for saving data

What is geoprocessing service in ArcGIS? Geoprocessing provides data analysis, data management, and data conversion tools. A geoprocessing service is a collection of geoprocessing tools published to a server site to perform tasks necessary for manipulating and analyzing geographic information across a wide range of disciplines. How do I publish geoprocessing service to ArcGIS server?

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