Linked Questions

1
vote
3answers
9k views

How to delete isolated pixels in ArcGIS 10.1? [duplicate]

I want to know that it is possible or not to edit the raster pixel in ArcGIS. I want to delete isolated pixel and I want to delete some pixel by manually. please tell me how can i do it manually or ...
9
votes
1answer
11k views

Extracting raster cells from imagery based on RGB value using ArcGIS Desktop?

I've got some aerial photography (format: IMAGINE Image) which is detailed enough to see to fire hydrants and a shapefile of fire hydrants which was digitized based on some CAD data. My project is to ...
10
votes
1answer
5k views

Smoothing raster features into polygon

I have raster data representing urbanized areas, which I'd like to trace and convert to a polygon. Using ArcMap's Raster to Polygon tool, I'm able to get something close to that. Unsimplified: ...
8
votes
1answer
2k views

How to apply a Majority filter in GRASS GIS?

I was wondering if someone could help me write a majority filter for GRASS GIS. I have this map (see below) which I need to run a filter over to make the red areas a bit more dominant. I know I can ...
6
votes
1answer
671 views

Creating forest patches from land cover layer?

I have a land cover layer from which I've extracted the tree canopy class and set all values that are not tree to NULL. I've also converted it to a vector and exploded it to make single part features. ...
8
votes
1answer
516 views

Raster smoothing

I am an italian student. I'm using ArcMap 10. For my thesis I need to simulate a debris avalanche, but in my elevation raster the avalanche deposit is included so I'd need to take it off to simulate ...
1
vote
0answers
641 views

ENVI: Postclassification, remove pixels of certain size

I did a classification over multiple Landsat imagery in ENVI 5.1, which turned out not too bad (ice and snow in Cyan in the picture below). Now I am about to do a postclassification to filter out ...
0
votes
0answers
304 views

Selecting contiguous area with raster in ArcMap?

In ArcMap 10.4, I have created a slope raster from a DEM and am trying to select only contiguous areas of slope less than 10 degrees. I have used the raster calculator to select that subset of slopes (...
1
vote
1answer
112 views

Aggregate disjoint polygons

I need to aggregate disjoint polygons within a certain distance in ArcGIS but it seems that the perfect command to do it, Aggregate Polygons, is only available with an ArcInfo that I don't have. ...
0
votes
1answer
79 views

Delineating boundary around many small polygons to reduce number of polygons but retain relative coverage using ArcGIS Desktop?

I am using ArcGIS Desktop 10.3 with an Advanced license. I ran the slope tool on a DEM and converted the resulting raster into a shapefile with two polygons, one with slopes > 40% grade and the ...