Modern methods of monitoring changes, making informed decisions and identifying trends in the geospatial industry are simply not feasible without GIS maps. A digital gis courses Australia becomes an indispensable course when you need to dynamically and interactively present geophysical data about the world on the screen. Depending on the task, different types of GIS maps are distinguished: classification, bubble, thermal, etc.
What is GIS Mapping?
GIS is a geographic information system, and mapping is, of course, a visualization of quantifiable data. Unlike traditional desktop maps, a GIS map is dynamic and interactive . It highlights and thus helps to detect previously unnoticed changes, and also shows how changes have occurred over time, in accordance with the selected parameters.
Geographic Information Mapping: How It Works
The human eye is tuned to actively perceive different colors and shapes, and in a GIS map, geospatial data from the real world is usually transformed into color models or shapes . As a result, information processing is faster, and this, in turn, allows you to make informed decisions more quickly.
With regard to the purely technical side of GIS mapping, the system relates a geospatial point with longitude and latitude coordinates to a specific data item. Then, in the process of spatial analysis, specialists measure the distance between these points and determine their relationship. This helps to better understand what is happening on our planet. The use of this technology enables geographers and other GIS specialists to visualize various statistical data, including the distribution of the customer base and demand for goods or services, demographic facts and other information. In particular, geospatial mapping is widely used in precision agriculture .
GIS Mapping Types
Depending on the visualization task, various types of GIS maps are distinguished. They can display anything like population density or crop classification. The most common are classification, thermal, cluster, bubble, quantitative, etc.
When you need to clearly understand the correspondence between map fragments and data segments, a GIS classification map is best suited. It is undeniably one of the most common types of GIS mapping because it is easier to create than others. Specific classes or parameters are assigned a specific color. The result is a user-friendly image with areas of different colors , each representing a specific class.
The term “GIS heat map” is often mistakenly applied to quantitative maps. However, in reality, it describes a unique conditional ratio that is taken into account when mapping. When extremely dense or mixed data needs to be presented, it is useful to apply the concept of general distribution to warmer and colder areas. Especially when it is known that the hottest spots show the highest concentration of a given amount.
The designation of “hot” regions in red and “cold” in blue is almost universal. Although this technique is not entirely accurate, it undoubtedly gives a general idea of the quantitative distribution of quantities .
This view effectively combines the use of colors, shapes, and labels to cluster densely packed data points. In other words, there are too many points to display each one individually. So for convenience they are combined into one cluster.
A bubble GIS map illustrates how the use of shapes and their size differences make it easier to organize complex numerical data. For example, you need to compare the number of certain slang words that are used in different regions. Smaller and larger circles represent larger and smaller Free gis software, respectively. Bubbles replace boring rows and columns and instantly give a general idea of the ratio of quantity and territory. To understand the situation, you just need to look at such diagrams , and this saves time and effort.
A quantitative GIS map contains coded colors. But these are different shades of the same color, which illustrate the quantitative difference in the data presented.
This type ideally solves the problem of visualizing multiple detailed data over a large area.
What is a Layer on a GIS Map?
The trick with digital GIS map layers is that they allow you to overlay different maps on top of the previous one on the same screen. In this way, different layers overlap and complement each other, which allows more information to be obtained. The user can easily navigate from layer to layer without any confusion.
The bottommost layer is the so-called GIS basemap. The satellite imagery basemap is familiar to many. However, depending on the specific task, any type of data can be used as a base layer to add subsequent layers.