topic Re: Your Suggestions are highly apprciated in Mapping Questions

Your Suggestions are highly apprciated

HusniSabah — Thu, 05 Aug 2021 12:02:42 GMT

This project is part of a program that I am taking. the map depicts areas of different levels of landslide susceptibility in Cariboo Regional District in British Columbia. I downloaded images Band 4, Band 5 and DEM from NASA so it will cover the boundaries. I ran a number of spatial analysis tools such as mosaic to rasters, rasters to dataset, extraction with mask, NDVI, Slope, from "fill to streams to feature", reclassify and weighted overlay. There are two different projections.. I will like to improve. First, why some areas are white? Why there some are white fuzziness?

I appreciate your feedback

Re: Your Suggestions are highly apprciated

DavidPike — Thu, 05 Aug 2021 13:54:06 GMT

Likely NoData. which has burned through. Ensure you set your NoData to 0 or 999 or whatever is suitable

Re: Your Suggestions are highly apprciated

HusniSabah — Thu, 05 Aug 2021 17:28:06 GMT

Thanks for the information.

Re: Your Suggestions are highly apprciated

maphanyanej_ubbw — Thu, 05 Aug 2021 19:42:46 GMT

When you train your satellite image, you need to make sure that most of the satellite image pixels have been trained - that is allocated land class categories. The areas that come out white are un-allocated pixels, those which have not been given a category when training was done. The more un-allocated pixel area, the more white spaces.

If you enlarge your image beyond its limits - that is beyond its spatial resolution allowance, the pixels disintegrate and your image will be fuzzy.

Good Luck

Re: Your Suggestions are highly apprciated

HusniSabah — Fri, 06 Aug 2021 20:52:31 GMT

Thanks for this hint