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Creating a chart in Google Earth Engine

Creating a chart in Google Earth Engine

Charts are used to represent data. They can be in different forms; such as pie charts, bar charts, column charts, line charts, scatter plots, and histograms. This blog will show a simple code for the creation of a bar chart in GEE. The result when the code is run is a bar chart as shown…

Adding a Legend in GEE

Adding a Legend in GEE

A legend is a quick guide and easy roadmap to enable the identification of the outputs of a particular analysis or study. In this blog, a legend is created for the supervised classification we did earlier. The following is a step-by-step guide for adding a legend in GEE. Create the legend title and style it….

Most Popular Libraries for Front-end Web GIS Development

Most Popular Libraries for Front-end Web GIS Development

The onset of the World Wide Web has revolutionized everything around us and GIS is not an exception.  The Web GIS is an advanced type of Geographic Information Systems made available on web platforms. It operates on the Client-server architecture. A GIS server is identified by a uniform resource locator (url). It responds and gives…

Accuracy Assessment in Image Classification on GEE

Accuracy Assessment in Image Classification on GEE

This post covers accuracy assessment on a sentinel image in the Google Earth Engine. Selection of the area of interest and the classification classes This is done using the geometry tool as shown below. One can use the point tool or the polygon tool in the selection of the classes. Selection of the Image collection…

Computation of NDVI using Google Earth Engine

Computation of NDVI using Google Earth Engine

Normalized Difference Vegetation Index (NDVI) is a spectral index used to quantify the greenness of vegetation. It is used to monitor the health of plants and understand vegetation density. Calculating NDVI is done using two bands: the red band and the near-infrared band. This computation can be easily adapted using the Google earth engine. This…

How to tweak GeoDjango Admin

How to tweak GeoDjango Admin

In my GeoDjango tutorial series, I shared details on the development of a web-mapping solution using GeoDjango. Depending on the structure of the application and the use, Django admin is a very useful feature in this framework. There is power in the admin. In this post, I will share some tips on how to tweak…

Using Photos in QGIS Projects

Using Photos in QGIS Projects

In QGIS, there are many formats of data-sets that can be used. Joins and relates help users get the best out of their data depending on the users’ needs. These tools exist out of-the-box for use by everyone. However, there are some tools or functionalities that are tricky to use as they don’t appear straightforward…

How GIS influenced my life

How GIS influenced my life

It was in 2010, when I received my KCSE results for the 2009 exam. Having passed the exam, I was to join campus a year later. Born and raised in the country-side, the dream of visiting and living in Nairobi was so real but seemed huge.  I would think about being in Nairobi each day…

3D Maps with Leaflet and eegeo.js

3D Maps with Leaflet and eegeo.js

We like maps and will continue like them more. Every day, there are changes in the libraries used for mapping. With most maps being 2D, exploring 3D maps is so much fun and better. In this post, I describe a procedure to display 3D maps for your web mapping project. First, we will have a…

A Web-GIS – A System for Agriculture

A Web-GIS – A System for Agriculture

Its quite some time since I talked about web GIS development on this blog.In the last one year,I have had a great time exploring different mapping platforms and testing any platform that I came across.Web GIS is a field in which over the last few years, has really seen the light of the day as…

Important Python Libraries for Geospatial

Important Python Libraries for Geospatial

Today, I take a look at the Python Libraries useful when dealing with Geospatial Data. The most popular GIS; QGIS and ArcGIS are developed on Python thus giving us the power to extend their tools to suit our needs in the organization. For Instance, QGIS offers the “Plugin Builder” tool that is focused on personal…

Maps for the Color blind

Maps for the Color blind

We are living in an era of digital maps.We’ve evolved from static maps to dynamic maps where different formats(icons,pictures) of information are being developed and shared by a large group of people globally.When mapping,less often do we consider the color blind.How do you paint a picture or develop a map when the color blind is…

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