I have a remote sensing image with GCS WGS 1984 / EPSG: 4326.
I need to extract pixel values from this image which corresponds to specific point locations. For that purpose, I defined these locations by entering their latitude and longitude in degrees. (I am using QGIS, I added the remote sensing image by using "add raster layer" and I defined the point locations by uploading a .csv file through "add delimited text layer"). Afterwards by using "identify features" tool in QGIS, I could access the pixel values of these locations.
My first question is, is the workflow I did follow correct? I am new in the field, and I am not sure if I missed some steps.
My second question is, (I am a bit confused how I can ask this, so please let me know if I need to clarify more) since the image I use is not projected to 2D, will this workflow give accurate results for the pixel values of these point locations? Or I need to project it first before extracting the pixel values?