Spatial Interpolation

Hi everyone,

I started the lab for Spatial Interpolation last week below are the results that I got for the two different methods I used.

Using the tool found in the Arc Tool Box > Spaital Analyst Tools > Interpolation > IDW...I ended us with the below result. 

IDW (Inverse Distance Weighting)

Using the tool found in the Arc Tool Box > Spaital Analyst Tools > Interpolation > Spline...I ended us with the below result.

Spline

In both maps the results show their is a high fecal cola form concentration in the Northwest part of the bay, which would give officials reasons to focus clean up efforts in that location.

Map Algebra and Spatial Analysis lab

Hi everyone!!

The following is a step by step of the process until I ran into a road block :-(

Below we have the two DEM that I retrieved from the seamless server... I picked the Little Colorado at Woodruff, AZ.

Next I set the environment and processing extent. (see below)

Geoprocessing>Environment



Next I megered the two DEM's

Arctoolbox>Data Mangement Tools>Raster>Raster Dataset>Moasic to New Raster



Next I reprojected the merged DEM.

Arctoolbox>Data Management Tools>Project and Transformation>Raster>Project Raster

Notice that the read out in the lower right is now meters in the picture...which was created by going to Insert>Add New Data Set





Next I created a hill shade using the reprojected DEM.

Arctoolbox>3D Analyst Tools>Raster Surface>Hill Shade

Now I created the below using the fill command.

Arctoolbox>Spatial Analyst Tools>Hydrology>Fill



Now I created a flow direction (below)
Arctoolbox>Spatial Analyst Tools>Hydrology>Flowdirection

At this point I tried creating a Flow accumulation raster but I was unable too.  Every time I tried using the tool it would run, run and run....  I also tried to trouble shooting.... by creating a smaller area and that didn't work either.  So I thought of one more thing that I am going to try during class.... hopefully it works, unless anyone else knows something that I don't know.