QGIS – Astro-Geo-GIS

Downloading OpenStreetMap vector datasets effectively

2024-12-172023-11-17 by Krukarius

OpenStreetMap platform is a worldwide free geographic database, updated and maintained by free volunteers. The primary advantage of this platform is the availability of the data, which can be downloaded anytime by the user unlike Google Maps, which requires appropriate payments. In fact, there are a few options for getting the GIS vector data from … Read more

Transfer AutoCAD drawing to ArcGIS Online part II

2024-12-182023-10-02 by Krukarius

Transfer layer from AutoCAD to AGOL via QGIS 2

The previous post explained to you the simplest way of migrating the AutoCAD drawing to ArcGIS Online. It included the important bits like the AutoCAD layer extraction as well as its further import to QGIS. In fact, this is the section, that doesn’t change, so if you are not familiar with it jump to the … Read more

The correct way of using QGIS Viewshed plugin

2025-01-212023-06-20 by Krukarius

Visibility analysis constitutes great importance in many fields such as sensor deployment, decisions for placement of mobile towers for maximum coverage, military operation planning, gaming, fire monitoring towers in the forest, urban design, landscape planning, etc (Saxena, Mundra, Jigyasu, 2020) or even for location graves (Lockwood, Masters, 2021). The explanations of the current text are … Read more

Transfer AutoCAD drawing to ArcGIS Online – part I

2024-12-182023-06-08 by Krukarius

This is the two-piece article, which aims to show you how to successfully add the AutoCAD LT drawing to the ArcGIS Online platform. In part 1 the superficial layer will be chosen, whereas the second bit will be more advanced. There is an instruction on how to load any GIS layer correctly to your ArcGIS … Read more

Choropleth map in QGIS based on the MS Excel data

2025-01-212023-06-03 by Krukarius

This time I would like to present an excellent way of making the simple choropleth map in QGIS, based on MS Excel data. Occasionally you will be acquainted with some tricks, which help you to understand how to plot the Excel data to your QGIS map correctly.

Using special characters in QGIS expressions

2024-12-182023-05-26 by Krukarius

This brief text explains how to use some custom symbols in QGIS expression. Obviously, it applies only to the quoted part, which represents the bits with string. There are 2 ways of doing it. The first method uses the char() element, which can give us the desired symbol, letter, or icon. In the case of … Read more

Export your QGIS project to AutoCAD LT with attribute table data

2024-12-182022-12-05 by Krukarius

After browsing the internet and trying my own approaches finally, I can come out with a nice method, that allows you to pass the attribute table data from your QGIS project to AutoCAD LT. Basically, the QGIS project can export to the AutoCAD environment easily. It’s just going to the Project -> Import/Export -> Export … Read more

Getting the total length of lines or polylines in AutoCAD LT – the most reasonable way

2024-12-182022-11-03 by Krukarius

The AutoCAD LT version is restricted to many fields. It impacts also the option of total calculation of the lines and polylines comprised of the given layer. Since our layer is not big, we can handle it manually by for instance the sum of separate calculations in the table or just simply by applying the … Read more

Autofill elevation data for any QGIS point layer

2024-12-182022-10-20 by Krukarius

In the recent text, I’ve shown you how to get the elevation data to QGIS without DEM. Imagine, that this is a track for equipping any point in QGIS with elevation data regardless of its location on our map. Maybe it’s not that useful when our point layer is restricted to some small area bounded … Read more

Elevation data in QGIS without DEM

2024-12-182022-09-13 by Krukarius

In this article, I want to demonstrate to you some shortcut, which is a product of two traditional ways of collecting the elevation data for any project in QGIS. The first way of collecting the elevation data in QGIS is by downloading and using the Digital Elevation Model from which this particular data can be … Read more

Displaying tourist trails on Google Satellite imagery in QGIS

2024-12-182022-08-11 by Krukarius

Tourist trail map in satellite imagery QGIS

There is a way in QGIS, which allows us to display the tourist trails overlay on Google Satellite imagery. It wouldn’t be interesting that much if not for the fact, that it can be exported as an image or printable as a map in Print Layout. In the next few sentences, I will demonstrate to … Read more

Nice trick for centering text label above the existing feature

2024-12-182022-07-28 by Krukarius

This short article will tell you how to place your text label exactly in the center of some existing features. The example is QGIS-based, although its usage is quite versatile as long as you create the text in the text box. The image below shows the print layout in QGIS (Pic. 1) which includes the … Read more

Setting default resolution when saving map as image in QGIS

2024-12-202022-06-22 by Krukarius

QGIS project offers a quick option for exporting our map as an image. Most sources explain the other way of exporting the maps from QGIS by using the print layout. And rightly so, because the print layout has much more options for customizing our maps and this is surely the most important thing in our … Read more

Updating the attribute table in QGIS from other layers

2024-12-202022-06-07 by Krukarius

QGIS update attribute table from other layers

The data attribute table in QGIS can be updated in different ways. We can use the “Default value” option, provide the formula to our column, and replace some content, and so forth. In this text, I will focus on the last option – replacing the content. In addition, I would like to show you the … Read more

Making fibre FTTx schematics in QGIS

2024-12-202022-05-07 by Krukarius

This article is dedicated to anyone, who works in the telecom industry and struggles with creating the FTTx schematics. We have several nice ways to combat our day-to-day work, although not all of them are for free – this is one reason. Another one refers to our particular project, which does not always fit with … Read more

Quick transfer the QGIS legend from print layout to Excel

2024-12-202022-04-23 by Krukarius

Maybe you were wondering about the possibility of transferring the legend from the QGIS print layout to Excel? This short text shows you how to do it, especially for the simple legend, which won’t last long. The tutorial is oriented toward not programming-savvy people, therefore please don’t expect any kind of automatization here. Of course, … Read more

The quickest way of making the speed limit map

2024-12-202022-02-11 by Krukarius

Previously I explained to you how to make the speed limit in QGIS and display it in Google Maps. This process required drawing the new layer including the speed limit of the given road sections collected from the Waze.com map service. Admittedly this is not the quickest way of getting a map such as this, … Read more

Displaying OpenInfraMap data in QGIS

2024-12-202022-01-26 by Krukarius

OpenInfraMap is one of many OpenStreetMap projects, which is concentrated on highlighting the infrastructure worldwide. Predominantly this infrastructure is invisible in the major OpenStreetMap rendering but is directly sourced from OpenStreetMap. The OpennInfraMap is focused on displaying: – Power, – Solar generation, – Petroleum (Oil & Gas), – Water infrastructure, – Telecoms. The map is … Read more

Preparing simple custom grid in QGIS print composer

2024-12-202022-01-18 by Krukarius

Print composer in QGIS gives us the possibility of creating printable maps and atlases, which can be saved as the .pdf or .svg. The print composer provides a wide spectrum of options by adding various elements and components to our maps. Next, we can resize, align, and rotate each other as we need to. As … Read more

Populating multiple Excel sheet stuff in QGIS

2024-12-202021-12-06 by Krukarius

Today I would like to discuss the process of how can we plot bulk data located in multiple Excel worksheets to QGIS and display them as the point layer. I definitely mean the situation, when your Excel data is equipped with the geometry, which allows the QGIS to locate all points correctly. The pivot of … Read more