Tag Archives: raster

WWTSD (What Would Tech Support Do?) Part II: Data-specific Issues

Esri logo

This blog post is part II of the WWTSD blog series from Esri Support Services. Click here to view the first part in the series: WWTSD (What Would Tech Support Do?) Part I. Have you ever attempted to run a geoprocessing tool, … Continue reading

Posted in ArcGIS Desktop, export, Geodatabase, Raster, Support.Esri.com | Tagged , , , , , , | Leave a comment

Classifying Images in ArcGIS for Desktop 10.4

With the addition of the Train Random Trees Classifier, Create Accuracy Assessment Points, Update Accuracy Assessment Points, and Compute Confusion Matrix tools in ArcMap 10.4, as well as all of the image classification tools in ArcGIS Pro 1.3, it is a great time to check out the image segmentation and classification tools in ArcGIS for Desktop. Here we discuss image segmentation, compare the four classifiers (Train Iso Cluster Classifier, Train Maximum Likelihood Classifier, random trees, and Support Vector Machine), and review the basic classification workflow. Continue reading

Posted in ArcGIS Desktop, ArcGIS Pro, export, Raster, Uncategorized | Tagged , , , , , | 4 Comments

Gathering raster properties for multiple datasets using Python

Raster Properties

Raster datasets have a large assortment of information beyond the basic pixel display. This information is stored in the properties and is helpful in understanding more about the data. Locating the properties of a raster dataset can be a tedious … Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , , | 3 Comments

5 Minute Trouble Shooting – Changing the Units on a Profile Graph

“Why does my profile graph show an elevation change of 11 feet over 1,111,111 feet?”

In general, profiles show the change in elevation of a surface along a line. They help to assess the difficulty of a trail for hiking or biking, or to evaluate the feasibility of placing a rail line along a given route.

A Profile Graph represents height on the Y axis and horizontal distance on the X axis. The unit of distance along the X axis depends upon the units of the projected coordinate system (PCS) of the elevation raster data. For example, if data is in a Universal Transverse Mercator (UTM) PCS, the unit of distance will be in meters; if data is in State Plane PCS, the unit of distance will be in feet (US) as shown in the following figure.

Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , | Leave a comment

Esri GRIDs are always 32 bit

Bitdepth

There are many different kinds of rasters that can be used in ArcMap. To better describe and explain these different kinds  of rasters, Esri has created help documentation on technical specifications and supported raster formats.  Included in the documentation is … Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , , , | Leave a comment

Calculating the slope of a hiking trail

Add Surface Information MXD

Trail hiking can be a fun and exciting activity when you properly prepare for the hike.  An important step for preparation is knowing the trail.  Some key factors include: length, minimum elevation, maximum elevation, and slope.  If you do not … Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , , | 6 Comments

Georeferencing in ArcGIS 10 or “Why is my georeferencing toolbar suddenly grayed out?”

Georeferencing Toolbar at ArcGIS 9.3.1 - After

Questions on georeferencing are some of the most common questions that we get in Support. These conversations range from basic how to questions all the way to questions like “Why are the buttons grayed out?”

Posted in ArcGIS Desktop, export | Tagged , , | 3 Comments

Using TINs Created with ArcGIS 10 in Previous Versions of ArcGIS

Have you opened your scene document to find a warning that the base surface for your 2D data cannot be found? The only thing different with this document is that it was saved as a previous version from ArcGIS 10.0 and you’re now opening it in ArcScene 9.3.1. Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , , , | Leave a comment

If Only This Topo Map Was More Interesting

Topographic maps are some of the most common maps that are in publication. They come in many shapes and sizes, but how can you really spice one up? What can you do to make a regular topographic map (like the one below) more interesting?

Continue reading

Posted in ArcGIS Desktop, export, Raster | Tagged , , , , , , | Leave a comment

Get Your Free Raster Data Here!

As a raster analyst, there are a lot times I try to “fix” many types of raster data from various online sources. If you’re going to get data from elsewhere, there are many reliable sources available for GIS data, some websites that charge a fee, and some that are really well-done free clearing houses and data centers.

Continue reading

Posted in export, Raster | Tagged , , , , | 9 Comments