There are many types of transformations, so you will first need to decide on what type of transformation you would like to perform on your imagery. Each transformation has its own advantage. By creating a transformation, you are leveraging multiple bands of information to highlight specific information that you are looking for. For example, if your area of interest has less vegetation and a lot of soil, you may want to consider a Soil Adjusted Vegetation Index (SAVI). Normalized Difference Vegetation Index (NDVI) for Differentiates between vegetated and non vegetated land, Enhanced Vegetation Index (EVI) for Alternative to NDVI for highlighting vegetation. It is sensitive to areas with high biomass ,Normalized Burn Ratio (NBR) for burn scars and severity. Works well for other types of change as well.
@@ExploreRSGISTutorials and what can I use for rasters that have only percentage of density of impervious area/forest/water as map legend? for impervious layers I can use EVI? NDVI for forests and NDWI for water? Additionally, how to detect changes between vector layers (if it is not possible I have this map also in raster) which illustrate on the map the occupied space by different land cover categories e.g. urban, forest, water, agriculture. I am interested in analyzing how the urbanization process is progressing, so mainly I would need to analyze urban sprawl. In other words - the occupation of forest/water/agriculture land by the urban category. could I ask for your help with this?
@@iwonafigacz566 Hope this article will help you.www.researchgate.net/publication/232724051_Analysis_of_Impervious_Surface_and_its_Impact_on_Urban_Heat_Environment_using_the_Normalized_Difference_Impervious_Surface_Index_NDISI www.linkedin.com/pulse/ndvi-ndbi-ndwi-calculation-using-landsat-7-8-tek-bahadur-kshetri#:~:text=NDBI%20%3D%20(SWIR%20%E2%80%93%20NIR)%20%2F%20(SWIR%20%2B%20NIR)&text=Negative%20value%20of%20NDBI%20represent,value%20for%20vegetation%20is%20low. For vector layers , there are several method to detect change. one can be clip two layer and calculate the changed area.
It depends on which Landsat image you gonna use in the analysis. Find band information Here :www.usgs.gov/faqs/what-are-band-designations-landsat-satellites?qt-news_science_products=0#qt-news_science_products
if i use sentinel 2 then what bands do i use
Does it only apply to areas where there is water, or can I also use it for urban areas to detect the difference in the scale of urbanization?
There are many types of transformations, so you will first need to decide on what type of transformation you would like to perform on your imagery. Each transformation has its own advantage. By creating a transformation, you are leveraging multiple bands of information to highlight specific information that you are looking for.
For example, if your area of interest has less vegetation and a lot of soil, you may want to consider a Soil Adjusted Vegetation Index (SAVI).
Normalized Difference Vegetation Index (NDVI) for Differentiates between vegetated and non vegetated land, Enhanced Vegetation Index (EVI) for Alternative to NDVI for highlighting vegetation. It is sensitive to areas with high biomass ,Normalized Burn Ratio (NBR) for burn scars and severity. Works well for other types of change as well.
@@ExploreRSGISTutorials and what can I use for rasters that have only percentage of density of impervious area/forest/water as map legend? for impervious layers I can use EVI? NDVI for forests and NDWI for water?
Additionally, how to detect changes between vector layers (if it is not possible I have this map also in raster) which illustrate on the map the occupied space by different land cover categories e.g. urban, forest, water, agriculture. I am interested in analyzing how the urbanization process is progressing, so mainly I would need to analyze urban sprawl. In other words - the occupation of forest/water/agriculture land by the urban category. could I ask for your help with this?
@@iwonafigacz566 Hope this article will help you.www.researchgate.net/publication/232724051_Analysis_of_Impervious_Surface_and_its_Impact_on_Urban_Heat_Environment_using_the_Normalized_Difference_Impervious_Surface_Index_NDISI
www.linkedin.com/pulse/ndvi-ndbi-ndwi-calculation-using-landsat-7-8-tek-bahadur-kshetri#:~:text=NDBI%20%3D%20(SWIR%20%E2%80%93%20NIR)%20%2F%20(SWIR%20%2B%20NIR)&text=Negative%20value%20of%20NDBI%20represent,value%20for%20vegetation%20is%20low.
For vector layers , there are several method to detect change. one can be clip two layer and calculate the changed area.
@@ExploreRSGISTutorials thank you so much for your time! This is very helpful :)
@@iwonafigacz566 Its ok friend. :):):)
If i use Landsat 2016 to 2019 which bands will use its
It depends on which Landsat image you gonna use in the analysis. Find band information Here :www.usgs.gov/faqs/what-are-band-designations-landsat-satellites?qt-news_science_products=0#qt-news_science_products