Category: Mapping

How to symbolize one-way streets

By Charlie Frye, Esri Chief Cartographer

Example of one-way arrows on streets

Indicating that a street is one-way and which way is valid to travel was a lot harder than it should have been prior to version 9.2. At 9.2, the new representations symbology makes this a much faster and easier task. To create this effect, you will need to have your street line data stored in a geodatabase which is a requirement for using representation symbology. Continue reading

Posted in Mapping | Tagged , , | 6 Comments

What does the Maplex Label Engine’s Street Placement option do?

By Charlie Frye, Esri Chief Cartographer

Maplex Label Engine's Street Placement Option

You may already have the Maplex for ArcGIS Extension. It’s free with an ArcInfo license of ArcGIS. Many ArcInfo users don’t know this and that fact has unfortunately kept many people from taking advantage of the superior text placement capabilities in the Maplex Label Engine.

One of those capabilities is the Street Placement option, it is available for line layers. Though it is obviously for street labeling, we are often asked what exactly does it do? Here’s the answer. Continue reading

Posted in Mapping | Tagged , | 3 Comments

Suggested workflow for creating hillshades

By Charlie Frye, Esri Chief Cartographer

Thumbnail

A few months ago I wrote a blog entry called setting the Z Factor parameter correctly, and I used the Hillshade tool as the example. Since then several people wrote into Ask a Cartographer with questions related to using the Hillshade tool, and we’ve responded additional guidelines that are worth sharing more broadly. Together, these guidelines form the basis our standard workflow in producing hillshade datasets.

Continue reading

Posted in Mapping | Tagged , , | Leave a comment

Creating hillshades: Workflow guidelines

By Charlie Frye, Esri Chief Cartographer

Thumbnail

A few months ago I wrote a blog entry called setting the Z Factor parameter correctly, and I used the Hillshade tool as the example.  Since then several people wrote into Ask a Cartographer with questions related to using the Hillshade tool, and we’ve responded additional guidelines that are worth sharing more broadly. Together, these guidelines form the basis our standard workflow in producing hillshade datasets.

Continue reading

Posted in Mapping | Tagged | Leave a comment

Creating a legend for hypsometrically tinted shaded relief

By Charlie Frye, Esri Chief Cartographer

Example of a shaded relief image

Here’s a question that has, in various forms, been posed on Ask a Cartographer:  “I have a map that has a hillshade and a DEM drawn with transparency on top of it. I cannot figure out how to make a legend that properly shows the final colors on my map; how is this done?” Continue reading

Posted in Mapping | Tagged | 2 Comments

Geoprocessing to split elevation into topography and bathymetry

By Charlie Frye, Esri Chief Cartographer

Geoprocessing - Thumbnail

When an elevation raster dataset contains values for both topography and bathymetry, often the best solution to this is to split it into two new rasters:  one for the topography and one for the bathymetry. The reason is that symbolizing this data is difficult. This is because a color ramp that contains appropriate hues for both bathymetry and topography must be adjusted so that it shows the shoreline exactly in the right place, at zero elevation.  Continue reading

Posted in Mapping | Tagged , | Leave a comment

Displaying coincident points

By Charlie Frye, Esri Chief Cartographer

We’ve had a number of folks writing in on Ask a Cartographer wondering how to displace or offset coincident points so all the points could be seen. Data with coincident points is most commonly produced as a result of geocoding addresses. There are at least two ways to handle displaying this data.  One would be to create a graduated or proportional symbol thematic map, and to do that the input point data would be processed with the Collect Events tool, which would produce output containing points that represented the locations and an attribute that indicated how many points were at that location. Continue reading

Posted in Mapping | Tagged , | 4 Comments

Gulf of St. Lawrence locator map is available

By Charlie Frye, Esri Chief Cartographer

The Gulf of St. Lawrence map was originally created for an Esri tutorial on how to publish a map to ArcReader.  The intent was to include a simple locator map with a few basic functions.  These cartographic effects and tasks are highlighted:

Posted in Mapping | Tagged , , | Leave a comment

ScaleMaster

By Charlie Frye, Esri Chief Cartographer

At the Esri User Conference this year we showed, in our technical session on lessons learned in cartographic data modeling, a tool we’ve been using for a few years now.  It’s called ScaleMaster, and we initially developed it to examine the idea that different kinds of geographic data (roads, lakes, rivers, contour lines, etc.) have differing levels of sensitivity to map scale change.  The “we”, in this case, was a collaboration between Dr. Cindy Brewer of The Pennsylvania State University, Dr. Barbara “babs” Buttenfield of the University of Colorado at Boulder, and ESRI.  ScaleMaster worked well to confirm our suspicions, and we also saw some additional utility in expanding ScaleMaster a bit. Continue reading

Posted in Mapping | Tagged , | Leave a comment

Organizing layers with too many unique values

By Charlie Frye, Esri Chief Cartographer

If you make zoning, soils, geology, or any of a number of kinds of maps where your data represent many different types of features, you can make use of some specialized functionality in the unique values symbology method in ArcMap’s layer properties symbology tab.  This functionality allows you to create headings within your layer’s symbols that will be shown in ArcMap’s table of contents and in your map’s legend.  Continue reading

Posted in Mapping | Tagged , , | 5 Comments