I need to detect areas, where land cover has changed between 2000 and 2017 across Baltics. I need to identify location of areas where change has taken place. For analysis, I was thinking of using CORINE land cover maps for 2000 and 2018, or satellite imagery. How can I find areas where changes happened using open source software?
Hi Dennis. You can use open source softwares like R and GRASS to do change detection.The idea is to get the raster stats for your study area for different years and compare them.In R raster package can easily do this.In grass you can use r.stats function to do this.You can use r.stats function from Q gis toolbox as well.You can also use the ESA CCI landcover time series to do the change detection.The maps are at 300 m resolution from 1992 onward and have many land-cover classes.
Hello Denis. For detecting land cover change I used satellite images in combination with orthophotos to calculate NDVI values with ArcGIS as well as QGIS for specific areas and seasons. I compared those NDVI values graphically to search for land cover changes. Furthermore I used Airborne Laser Scanning data (digital terrain models and digital surface models), again in combination with GIS tools to detect changes (eg. forest to meadow). Cheers Paul
You got a number of options:
If you download free datasets (e.g. Landsat/MODIS), You can process/classify them using;
1. Free GIS software (QGIS, GRASS)
2. Working with programing package, eg. R, Python, etc
or by
3. Using Google Earth Engine (You don't need to download data)
You can use QGIS as open source and Sentinel 3 data set for land use / land cover.
Hi Denis, you can use the Semi-Automatic Plugin (https://plugins.qgis.org/plugins/SemiAutomaticClassificationPlugin/) developed by Luca Congedo for QGIS for implementing change detection between two land cover maps.
For detecting land use and land cover "Modules for Land Use Change Simulations - MOLUSCE" (https://plugins.qgis.org/plugins/molusce/), which is a plugin for QGIS (https://www.qgis.org/en/site/) or, Monitoring land-cover changes on sites of conservation.
Other read these articles: Article Open-source mapping and services for Web-based land-cover validation
@Mery Biswas Thank you Mery! I think Sentinel 3 imagery will be helpful!
@Pawan Thapa Thank you Pawan! Which conservation websites you could recommend?
I suggest you to follow https://www.sciencedirect.com/topics/earth-and-planetary-sciences/land-cover-change
Article Land use/land cover change detection combining automatic pro...
https://www.pantechsolutions.net/land-change-detection-using-matlab-code
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