Category: Geographic Information Systems

Accessing variables and functions from QGIS in Qt Designer

Does QGIS use Qt? QGIS is heavily dependent on the Qt library. Almost every part of QGIS utilises the Qt library!  What is Qt Designer with QGIS? Qt Designer is an easy-to-use program to build UI’s for Qt frameworks. Luckily, QGIS ships the program with its core on all operating systems and should be available

Using For Iterator in ArcGIS ModelBuilder?

How to use iterator in model builder? Quote from video: And then you're going to model run or you can engage what are called parameters. And you'd run a model by double-clicking right and then you do your inputs like a tool. How do I add a tool to ModelBuilder? In ModelBuilder, double-click the Buffer

Setting projections in QGIS

How do I set projections in QGIS? First, click on Settings > Project properties. Then, click on the box labelled as Enable on the fly CRS transformation. Next, select the projection which the current layer and all the subsequent layers will be using in common.  How do I set a projection in GIS? To define

ArcGIS model and python script integration

How do I add a Python script to ArcGIS? In the list of side tabs, click the Exection tab. Type your Python code directly in the Execution tab. If encrypting your code is required, click the Encrypt button. and then provide a password. Optionally, if you already have a script, click the Folder button. and

Using terrain correction in SNAP sentinel 1 toolbox removes all the values

What is terrain correction in SAR? Radiometric correction removes the misleading influence of topography on backscatter values in synthetic aperture radar (SAR) images. Terrain correction corrects geometric distortions that lead to geolocation errors. What is terrain correction snap? Terrain correction corrects geometric distortions that lead to geolocation errors. The distortions are induced by side-looking (rather

Creating polygon with one click in QGIS?

How do I create a new polygon in QGIS? Quote from video: Type. So in this case we're going to use the polygon. So i will choose as a polygon. So this option. So i will choose the coordinate system as wgs 84. So now click ok. How do I create a polygon from a

How do I get my Data Driven Pages Inset Map to center the grid featured?

How do you center a map frame? Right-click the map frame, select Align and Align to Page. Right-click the map frame, select Align and click Align Center. Right-click the map frame, select Align and click Align Middle.   How do I change the scale of a data driven page? Then, after exiting the Setup Data

Calculating X and Y of line start and line end using ArcPy?

How do you find X and Y coordinates in ArcGIS? Procedure In ArcMap, right-click the layer of interest, and select Edit Features > Start Editing. On the Editor toolbar, click the Edit Vertices tool. . Click the Sketch Properties tool. . The Edit Sketch Properties window opens, and the XY coordinates of the line vertices

REST Queries for ESRI Map Service Raster Layers

What is REST API ESRI? Introduction. The ArcGIS REST API allows you to administer ArcGIS Server programmatically. This means that you can completely manage your server using any framework that can make HTTP requests. The API is organized into resources and operations. How do I add ArcGIS REST services to ArcMap? You can use a

Troubleshooting “import arcpy” command?

How do I import an Arcpy module? To import an entire module, use the import module: # Import only arcpy.mp import arcpy.mp. # Import arcpy, os and sys import arcpy import os import sys. # Import env from arcpy and set the workspace environment from arcpy import env env.workspace = ‘c:/data’ How do I know

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