Category Archives: Raster
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
It is difficult to troubleshoot serious problems with any type of software. When faced with repetitive and persistent crashing, it is important to ask yourself questions like, “Does the problem occur on multiple machines?”, “Does this occur for every user on a machine?”, and “Is the problem specific to certain data?” One of the more common reasons that ArcMap may repeatedly crash is when there are issues with the display adapter. An easy way to check if your display adapter is causing problems is to temporarily disable the adapter to see if that resolves the issue. Continue reading
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
Lidar data is become increasingly available and there are likewise new tools to analyze and display the data. LAS is the public file format for the interchange of three dimensional point cloud data between data users. LAS information can be … Continue reading
With the release of ArcGIS 10, new tools were made available, allowing you to use 3D objects in geoprocessing tools, and opening up new possibilities for proximity analysis. One of the new tools is the Near 3D tool, which calculates the three-dimensional distance from each input feature to the nearest feature residing in or more nearby feature classes. However, when using the new 3D analysis tools, it’s always important to consider the geometry of the features being used. Continue reading
“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.
The Add Raster to Mosaic Dataset tool has many input options to consider when adding your data, including choice of raster type. Within the help documentation, there are twenty one different raster types to choose from among sensor products, aerial imagery, … Continue reading
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
I am sure many of you have already heard about CityEngine, and some of you may have even already contacted Support Services with questions related to it. For those who haven’t been introduced, CityEngine is a stand-alone software product that provides professional users in … Continue reading