on February 12, 2023
ArcGIS sr.lock “LOCK file” how to delete?
Geographic Information SystemsCan I delete lock files ArcGIS? lock files can only be deleted if the process that created them has exited. An example of a read lock is ‘Parcels. How do I remove schema lock in ArcGIS? To disable schema locking in Manager, complete the following steps: Start Manager and sign in. Click Services > Manage
on February 12, 2023
Looking for a QGIS 3.12 equivalent to Trim in ArcMap
Geographic Information SystemsHow do I use TRIM feature in Qgis? Quote from video: Okay so if you want to trim i'll click on the green. One click again on the trim and extend symbol i want to trim. This line by this so i'll click on this line. And then i'll trim by clicking. How do I
on February 12, 2023
Dropped geometry_columns and geography_columns tables
Geographic Information SystemsWhat is the difference between geography and geometry in PostgreSQL? 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 earth’s surface, as specified by latitudes and longitudes. What is geometric vs geographic data?
on February 12, 2023
Updating field of selected results in PyQGIS?
Geographic Information SystemsHow do I update an existing field in QGIS? In quick field calculation bar, you simply need to: select the existing field name in the drop-down list. fill the textbox with an expression you directly write or build using the expression button. and click on [Update All], [Update Selected] or [Update Filtered] button according to
on February 12, 2023
What are units for calculated area in QGIS?
Geographic Information SystemsWhat is the unit of area calculated in QGIS? If you open QGIS and go to Project Properties -> General you can set your units to return an linear and area measurements that you need for a project regardless of your data’s projection or CRS. In the First Example I have set my units for
on February 12, 2023
How to geotag photos from KML files
Geographic Information SystemsHow do I geotag a photo from a GPX File? Quote from video: Right click and choose stacking. And expand all stacks I want to make sure that all the photos are visible. So when I do command a or ctrl a on a PC to select them all I'm selecting all the photos. How
on February 12, 2023
Compiling a list of units that border each other
Geographic Information SystemsHow do you add a border to a list in HTML? Using Inline Style attribute Add the border using inline property. What is the correct syntax for border properties? The border property is a shorthand property for: border-width. border-style (required)Definition and Usage. Default value: medium none color Inherited: no Animatable: yes, see individual properties. Read
on February 12, 2023
Getting not NULL values from three columns in one column in QGIS
Geographic Information SystemsHow do you check for NULL values in multiple columns? The syntaxes are as follows: Case 1: Use IFNULL() function. Case 2: Use coalesce() function. Case 3: Use CASE statement. Case 4: Use only IF(). Case 1: IFNULL() Case 2: Coalesce. Case 4: IF() How do I get rid of NULL values in Qgis?
on February 12, 2023
ADC Maps Grid to Lat/Long Coords Conversion
Geographic Information SystemsHow do you convert grid coordinates to latitude and longitude? World Map Conversion Divide the length of the x-axis by 180 and the y-axis by 90. This will give you the equivalent of each latitude (LA) and longitude (LO) angle in inches. Mark the coordinates of a location on the two axes. What are ADC
on February 12, 2023
SQL Geometry Query similar to Select by Centroid
Geographic Information SystemsWhat is the difference between spatial geometry and geography in SQL Server? SQL Server supports two spatial data types: the geometry data type and the geography data type. The geometry type represents data in a Euclidean (flat) coordinate system. The geography type represents data in a round-earth coordinate system. What is the difference between geography