1
vote
1answer
37 views

How do you remove isolated roads from a bigger network?

I'm trying to perform an OD Cost Matrix calculation on a set of points using a road network from OpenStreetMap data. The network contains lots of roads that don't connect to the rest of the network. ...
0
votes
0answers
23 views

classify lines in shapefile by distance to other lines in same shapefile

I'm using ArcGIS 9.3 (and have XTools Pro). I need to classify each line in a shapefile by how close it is to other lines in the shapefile (ie less than 475 ft, less than 450 ft, less than 425 ft) ...
2
votes
0answers
63 views

Flood extent extraction from satellite images

How i can extract the floodwater from satellite images? Is the image classification method accurate for moderate-resolution satellite (Terra/Aqua MODIS)? Or is there a more accurate methods? Thanks.
1
vote
1answer
88 views

ArcGIS raster data - Group statistics for classification

I'm trying to figure out how to classify a group of rasters. These can't be joined as they have overlaps which must be kept. I was wondering whether there's a way of obtaining grouped statistics - eg ...
0
votes
0answers
40 views

Using boolean variables in a fuzzy overlay

This question has to do with using Spatial Analyst's Fuzzy Overlay with continuous rasters and boolean rasters. The problem is that using Fuzzy Or will result in the boolean raster negating the ...
1
vote
2answers
167 views

Vector Machine Classification in ArcGIS

Is it possible to perform a vector machine classification of raster image using the ArcGIS software package. This supervised classification method is available in the ENVI software but not for ArcGIS. ...
3
votes
0answers
271 views

What is the convergence threshold for ArcGIS Iso Cluster?

The ArcGIS tool Iso Cluster Unsupervised Classification does not seem to have any documentation on the convergence threshold used in the tool. To compare, Erdas Imagine has all of the necessary ...
1
vote
0answers
81 views

From classified image to topology in ArcInfo

I have some coastal 4 band imagery that I have classified to designate land, water, and undetermined. I want to convert this to polygons with topology, and significantly simplify the polygons. If I ...