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QGIS Tutorial: Unsupervised classification using KMeansClassification

Unsupervised classification is based on software analysis. It uses computer techniques for determining the pixels which are related and sort them into classes. In this post we doing unsupervised classification using KMeansClassification in QGIS. For supervised classification check earlier articles.

For Beginners check – QGIS Tutorial

Unsupervised classification using KMeansClassification in QGIS

Add a raster layer in a project Layer >> Add Layer >> Add Raster Layer.
Go to the search box of Processing Toolbox , search KMeans and select the KMeansClassification.

Select the input image. Type the Number of classes to 20 (default classes are 5) . Fill training size to 10000.

Type the name of output image save to file.

And in the last tap on Run

Output image directly display on canvas. Image is shown below.

In the layer panel, right click on the output layer and select Properties >> Symbology. Change Render Type Singleband Psuedocolor.

Select the Color Ramp ( we selected spectral)
Choose Mode Equal Interval (default selection is continous)
Change the number of classes from 5 to 20.

In the last click on OK. Output image is provided below. You can also classify according to discrete interpolation if desired.

This is all about unsupervised classification using KMeansClassification. If you face any problem in implementing then please do comment.

QGIS Tutorial – Vector Analysis – Create New Projection

Projection is a method to represent 3D data into 2D. It plays a important role in GIS. A map projection is termed as Coordinate Reference System (CRS) and QGIS allows users to define custom CRS. So in this article QGIS Tutorial – Vector Analysis – Create New Projection we will get familiar with creating your own CRS as per need.

Create 3D map in QGIS

Change projection of a georeference file in other projection – Reprojection in QGIS

QGIS Tutorial – Vector Analysis – Create New Projection

Start a new map >> upload a vector file using add layer in layer in menu bar.
Go to Setting menu bar >> select Custom Projections

Tap on Add new CRS button for new projection creation shown in below image.

In the Name field fill Van der Grinten I and in the Parameters fill this string

+proj=vandg +lon_0=0 +x_0=0 +y_0=0 +R_A +a=6371000 +b=6371000 +units=m +no_defs

And in the last click on OK

Now click on CRS button in the status bar at the bottom right of QGIS button.

Filter the user defined projection, Select and click on OK button.

Here is the map with new projection. It looks interesting then earlier one.

This is about creating or changing projection of vector data in QGIS. If you are newbie learn OGIS from Free QGIS Tutorials

Use GIS MapOG Tool for GIS Mapping.

Download Shapefile free and practice in IGIS Map Tool.

What is bearing angle and calculate between two Points

In geometry angles are measured regardless of direction or orientation as in trigonometry we measure angle by rotating anti clockwise. Here x-axis is (0) zero degree and y-axis is at 90 degree. So in this article we get familiar with What is bearing and calculate angle between two points. In GIS bearing angle is used for navigation or direction.

Try Route Compass Mobile App for calculating bearing angle and distance.

https://play.google.com/store/apps/details?id=com.bearingangle&pli=1

Calculate Bearing angle in Mobile App

Online Tool To Calculate Bearing Angle and Distance To Make Route

Bearing is a direction measured from north and it tracks angle in clockwise direction with north line which means north represents zero degree, east is 90 degrees, south is 180 degrees and west is 270 degrees.

Bearing angle at a point with respect to north at P if we measured clockwise then we see in gif is 065 degrees and at Q it is 300 degrees.

What is bearing and calculate angle between two points

A bearing is used to determine direction of one point relative to another point. You can see in gif given below.

Bearing of two points

Formula to Find Bearing or Heading angle between two points: Latitude Longitude is

β = atan2(X,Y),

For variable Y = sin(toRadians(lo2-lo1)) * cos(toRadians(la2))

and variable X = cos(toRadians(la1))*sin(toRadians(la2)) – sin(toRadians(la1))*cos(toRadians(la2))*cos(toRadians(lo2-lo1))

Check video on Bearing Angle and like, share and subscribe our IGIS MAP Channel on youtube.

You can also check Bearing Angle Tool

Learn QGIS

Download free Shapefile GIS Data

Create a free tour or video in Google Earth Pro

Google Earth a google developed free platform that allows us to view high resolution satellite image of Earth, Moon, Mars and sky. Through Google Earth you can explore the world with satellite imagery. In the previous article we explained how to Download Satellite image for free. A 3D representation with 360 degree view. For GIS people Google Earth is interesting tool for learning.

You can do many amazing things with Google Earth. In this article we writing about Create a free tour or video in Google Earth Pro.

Download free licensed version of Google Earth. Google Earth generates KML or KMZ files and you can create download kml or kmz

Create a tour or video in Google Earth Pro

Go to My Places in the left side of the Google Earth App and right click >> tap on Add >> Click folder.

Fill the Folder name and description (if any).

Next step is to search for first location from where you want to start your tour. Like I am creating tour on seven wonders of world and my first location is Machu Pichu, Peru.

After writing location name click on search button. Then you will be directed to the location.

Now we will insert placemark at this Location. Go to tool bar of Google Earth and tap on Add Placemark icon icon shown below.

Place your place mark where you want. Default color is yellow for pin but you can change it by clicking on pin. Fill the location name.

Fill the description you want to show on the location when you click on the placemark.

You can insert image directly using Add local image or Add web image by copy the image address.

Tap on OK button after filling details or link.

After placing all location you can click on the with folder shown in below image.

Tour will play after clicking play tour button in the left. Now you can record it by tap on record icon in the tool bar. Once recording is completed you can save the tour or video on your system.

This all about How to Create a tour or video in Google Earth Pro. It is beneficial in teaching also. If you face any problem please do comment. Any suggestions are also welcome.

Checkout video tutorial for Create tour or video in Google Earth Pro for better understanding

Want to learn QGIS then you are at right place.

Create and Share Custom Maps – Add on Website, Social Sites Share

Howdy Guys, in these days and age of open source society where people no spun out depends on told information maps play a vital role. In this article we are showing a feature of IGIS Map Tool – Create and Share Custom Maps – Add on Website, Social Sites Share. You can share maps for business websites or you can create maps for academic projects or presentations because visual things are more easily grasped then textual.

Nowadays customer expect to fend for themselves. They come online multiple times for checking information. New mapping technologies created the life easier. And You can share a location, directions or map by GIS MapOG tool. You can share:

A place, business or address
A directions search
A street view image

Go to GIS MapOG Tool
Create a Map using Point, Line or Polygon Layer or upload your data. If you don’t have the data then use sample data .
After creating a map, we do some styling. Tap on drop and select Styling.

Select-Style - Select the styles you want from different type of style

Fill and border color can be changed here. For more attractive map choose Category Style and tap on Edit Layer and then select the layer which you want to edit.

Edit- Layer - Edit the layer as per your need

After Custom Legend Your map will be displayed on the screen.

Australia Shapefile- After Editing Yor Map will look like this Amazing

How can I go about sharing a map?
Share digital maps to your teams or upload on website.

Share map - Share maps to your teams and on your websites.

After clicking on Share Map this will come shown below.

Share-Data- Share Map to your friends or on your website

You can share your Maps in 3 different ways as shown above.
Lets See about Share Map (Public)

Fill the Title of the Map, Paste the link of your Map.
Navigation Bar.-Select the desired color of your navigation bar of map.
Click Add Item if you want to add items on navigation bar. You can also add the website link on your navigation bar of map. Once you done with this Tap on Share Map.
After clicked on share map, url will be created.
Through that url you can share your maps with others.

Create -Link- And share on websites and to your groups to view map instantly

In General to share the maps url created with encryption by the map tool.

Share Maps via Social Sites:

User can also share maps directly on social media like facebook, Twitter, Google+ and Linkedin. IGIS Map tool have provided Social media buttons on the sharing panel to initiate the sharing process for users. Or user can share the generated URL on social sites

You can Embed Customized Map on your business website to so that customer access become easy. Customized Map Screen is Shown Below. We have created a map of Australia with logo of IGIS Map and with website link of facebook, twitter

Checkout Video Tutorial on Create and Share Custom Maps provided below.

This all about Creating a Map and sharing the map with website link and logo. If you face any problem please do comment.

You can do more with IGIS Map Tool Check –

QGIS Tutorial – Quantum GIS Guide

QGIS is one of the most common open source application used by GIS analyst, Geographers, Civil Engineers and many other professionals. If you are new in the field of Geographic Information System (GIS) you should consider learning this application, as it will help you to solve many complex problems, analyze area, create reports etc. with just few clicks. Let me introduce you what is QGIS and why you should consider using it before providing all the QGIS tutorial links.

What is QGIS and its Advantages:

QGIS is a Desktop based Geographic Information System (GIS) Application for creating maps, editing, viewing and analyzing Geospatial data. Quantum GIS is a cross platform, free and open source application. It can be run on multiple operating system like Mac OS X, Windows, Ubuntu, Linux and Unix.

QGIS has many advantages over other application like:

Simple, easy and User friendly Interface(UI).
Is of small size and consumes less RAM memory compared to other GIS application.
Supports all kinds of GIS file formats – Either vector or Raster.
Tons of plugin are already developed for additional functionality which can be used and added directly. If you don’t the plugin you need, then you can
Code in Python or c+++ for integrating the one.
A free software application under GNU GPL License
And many more.

Download QGIS from Official Website

QGIS 3.4.4 tutorial:

Download, Uploading and Converting geo files in QGIS

Digitizing, Processing, Analyzing, Georeferencing in QGIS

Visit IGIS MAP Youtube Channel for free QGIS Tutorial

QGIS Database Linking

This list will continuously updated as the number of articles for tutorial would be published. If you are an expert in QGIS please consider contributing a tutorial article for same here.

Free Trial of MapOG Tool

QGIS 3.4.4 tutorial : Creating, Editing and Mapping in GIS

Hello Folks if you are looking for QGIS 3.4.4 tutorial then you are at right place. Here in this article QGIS 3.4.4 tutorial : Creating, Editing and Mapping in GIS you will grasp to create new shapefile.

QGIS 3.4.4 tutorial : Creating, Editing and Mapping in GIS

Before creating new map layer go to browser panal. Choose XYZ tiles and select OpenStreetMap. OpenStreetMap is added to the canvas. Zoom in and pan the map if require.

For creating new layer go to layer in the menu toolbar. Select New temporary scratch layer. Fill the layer name and select the geometry of the layer you want.

Select Add polygon feature from digitizing toolbar.

Now Create your Layer using Add Polygon Feature.

You can edit the Map using Vertex Tool shown in below image.

You can toggle editing by clicking toggle icon from digitizing tool bar. Now Save your new layer by right click on the layer. Tap on Export and click Save Features As..

Choose the format of your Layer. Give the file name and browse the location of file. Final step tap on OK button. Here is your new shapefile.

If you want to create your Map more interactive then go to Symbology by right click on the layer and select Properties. Tap on Ok after editing.

This all about creating new layer and GIS Mapping in QGIS. You can also export it as a PDF/SVG. If you trouble in doing this then do comment.

If you are QGIS beginners then checkout following Tutorials –

Quick Embed Customized Map on website

Quick Embed Customized Map on website is a easiest way of adding a map on your website. And make your website interactive by embedding map on it. Maps are more attractive then numbers and words. It is also beneficial for your business.

Quick Embed Customized Map on website – Using Igis Map Tool

Benefits of Embed Maps on your website

With the help of Igis Map Tool you can build your own customized map and share or add on your website. This interface encourage your clients to interact with you and it creates stronger bonds. Lets understand using some examples. It is helpful for many business like for grocery store or you have a franchise of store in a particular area and you want to locate your store on map and embed it on your business website. You can pin your shops location. With this customer can reach you very easily and it will save time of customer otherwise they have to go on google and search for your store address.

Like you owns a chain of School name New Harbor School. In a particular state you have number of school campus. One of your student parents want to shift to other end of the city because of job change and don’t change the school . Then using this embed map where address of your branches of school are pinned they can track near about campus. It takes hardly few second.

Build, Customized and Embed Map on Website

Go to GIS MapOG Tool, login or register for using the tool.
Create your customized map and pin your locations. You can build Point, line and Polygon. Let suppose you owns boutique store in various states of US. You places the points on your location as shown below.

After putting boutique location tap on Map Tools and in the drop down select share Map.

In the Share Map box tap on Embed and copy the Embed Code.
Paste code in the source code of your website.

This is all about of adding map on your website. Giving a visual representation of your business location and activities attracts from user of your services or product. Embed map screen shown below.

Using such a interface which is visually interactive and engages your clients better. This increases their comfort level and making them more likely to enter your doors. Try at your ends and if you face trouble then please do comment.

If you are new to IGIS Map Tool then Go To GIS MapOG Tool Guide

QGIS Tutorial – 3D Map view in QGIS 3.4.6

Hi GIS learners here in this series of QGIS Tutorial we learn 3D Map view in QGIS 3.4.6. For 3D view you need DEM – Digital Elevation Model. If DEM alien to you then first understand what is DEM.

What is DEM?

Digital Elevation Model abbreviated as DEM is a 3D view or raster representation of terrain and its is in grid form. Each cell represents a value and each cell or pixel have their single attribute. We can define it as an ordered array of numbers that represent the spatial distribution of terrain attributes. The quality of DEM is a measure of how accurate elevation is at each pixel level and how accurately is the morphology presented.

QGIS Tutorial – 3D Map view in QGIS 3.4.6

For Creating 3D Map you need to Download DEM. After downloading DEM file you need to unzip it. (Extract hgt file) Then in the menu select go to layer >> add layer >> add raster

Upload the raster file.

Uploaded DEM is displayed on the canvas.

Now go to the layer panel, right click on the published layer and select properties.

In the menu bar click on View and tap on New 3D Map View. Then following screen will appear.

If you receive error message then change the CRS to WGS 84/ World Mercator – EPSG 3395. Message image is displayed below.

In the 3D view screen tap on setting.

In the 3D configuration select the elevation, change the vertical scale and tile resolution.

Move your image by pressing shift + left button of mouse or track pad of laptop.

Above image is the 3d view of map. This all about 3D Map view in QGIS 3.4.6. We tried our best using pictorial presentation of QGIS tutorial if you still face any problem please do comment.

Convert Shapefile to DXF

Shapefile is a vector GIS format developed by Esri. It stores geographical information data. Shapefile have three geometries point, line and polygon. GIS data can be stored in different formats and the conversion of data from one format to other is also possible.

So in this post we convert Shapefile to DXF. Before conversion lets know what is DXF ?

What is DXF ?

DXF is a CAD (Computer Aided Design) fil format and it stands for Drawing Interchange Format or Drawing Exchange Format. DXF files make it possible to share drawing data and text-based formats across different CAD applications. DXF files are supported in several 3D applications and are completely open-source, so users can access AutoCAD files without using Autodesk programmes.

Convert Shapefile to DXF

For Shapefile to DXF conversion, go to GIS MapOG Online Convert Shapefile to DXF Tool, after logging in with your registered email and password. If you are a new user, click the Sign Up button in the Login popup and register to GIS MAPOG by filling the details.

There are three main steps for using GIS Converter:

Upload the data
Choose the format to which it should be converted
Download the converted file.

Step one is to upload your Shapefile which you want to convert. You can upload your file from system or select from the Recent Files.

Here we have uploaded the Shapefile of the Texas state of USA.

Step two is to select the output format from the dropdown for the converted file, in this case its DXF. You can also set the Coordinate Reference System of your preference. As a default CRS will set to WGS 84 (World) [EPSG:4326]. Now Click on the Convert File button.

After a few seconds, your Shapefile will be converted to a Shapefile file and will be available for downloading.

You can also choose to style the layer or continue with further conversion process by clicking the Convert Another File button.

Converted Files section from the dashboard contains the list of the details of all the conversion done in your account, providing both input and output data available for download their corresponding formats.

Other GIS data Conversions

If you are facing any problem in conversion or login then please let us know by mailing at support@igismap.com or drop comment.

Unsupervised classification using KMeansClassification in QGIS

QGIS Tutorial – Vector Analysis – Create New Projection

Bearing of two points

Create a tour or video in Google Earth Pro

Share Map for Business –

Create and Share Custom Maps – Add on Website, Social Sites Share

Share a Map – IGIS Map Tool

What is QGIS and its Advantages:

QGIS has many advantages over other application like:

QGIS 3.4.4 tutorial:

Download, Uploading and Converting geo files in QGIS

Digitizing, Processing, Analyzing, Georeferencing in QGIS

QGIS Database Linking

QGIS 3.4.4 tutorial : Creating, Editing and Mapping in GIS

Quick Embed Customized Map on website – Using Igis Map Tool

Benefits of Embed Maps on your website

Build, Customized and Embed Map on Website

What is DEM?

QGIS Tutorial – 3D Map view in QGIS 3.4.6

What is DXF ?

Convert Shapefile to DXF

Other GIS data Conversions