Data Verification and Editing
Spatial data in a GIS need to be checked for mistakes to make sure they’re accurate. Mistakes like missing bits or lines that don’t match up can happen when putting data into the system. One way to find these mistakes is to print out the data and compare it to the original map, looking carefully for any differences.
There are a few types of mistakes that can happen:
- Missing or Extra Data: Sometimes, parts of the map might be left out or added in by mistake.
- Wrong Scale: If the map is drawn at the wrong size, the data won’t be accurate.
- Distortion: Maps or photos might be warped or changed, making the data wrong.
To fix these mistakes, special tools in GIS software are used. It can take a lot of time to correct them, but it’s important for getting the right information. Mistakes in maps with lines and shapes can be fixed by moving them around on the computer screen. Other tools can help change or delete parts of the map that are wrong.
When using different types of data together, like maps and photos, they all need to be in the same format. Sometimes, data needs to be changed from one format to another to make sure they work together correctly. For example, turning maps into grids or changing photos into lines and shapes. This is important for making sure the data is easy to work with and takes up less space.
Sequence of GIS Activities| Practical Work in Geography Class 12
In this article, we will look into the topic of “Sequence of GIS Activities” from the NCERT Class 12 Practical Work Geography book. These notes are specially curated by an expert team at w3wiki for all the students.
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