You may be informed of some of these differences in the log file that is generated when you import a map.įor instance, simple line symbols using a dash or dash-dot pattern do not honor a map's reference scale and draw with different spacing depending on the dpi requested. Because of these inconsistencies, simple symbols may draw differently in ArcGIS Pro. Simple symbols (simple line symbol, simple fill symbol, and simple marker symbol) sometimes display in an inconsistent manner in ArcMap. If WidthInPixels is equal to or greater than 1.5, use the following formula to determine the edited width: If WidthInPixels is less than 1.5, the width should not be changed. WidthInPixels = (LineWidth in points * TargetResolution in dpi)/72 Note that the hard-coded number of 72 in the examples below is the conversion factor of points per inch. It is recommended to set the value for TargetResolution to reflect the desired minimum resolution at which the symbol will be used. To determine the appropriate line sizes for a given resolution, type the sizes of each of the symbols in the multilayer line symbol into the following formula.
Design lines for a specific resolution (dpi) This also allows conversion for use with a target dpi other than 96 dpi (for instance, a target resolution of 120 dpi). To alleviate this situation, manually change the size of the multilayer line symbol so that the line sizes are more appropriate. Note that the casing lines no longer appear dashed in the corrected version. Left: Original line widths of the expressway symbol are rendered in ArcGIS Pro. Antialiasing can greatly improve a line's appearance, but at the cost of performance. Also, for target export formats that use an 8-bit palette (such as PNG 8 or GIF formats), antialiasing may not be as effective due to the dithering required to render continuous progressions of color. Depending on the requirements of the map, this may be unacceptable. For example, using antialiasing can reduce drawing performance.
#Difference between transcad and arcgis pro#
Right: ArcMap.ĪrcGIS Pro is capable of applying antialiasing to alleviate the effects of the changed appearance, but there are some cases in which antialiasing is not the best option. An example of aliasing due to more precise rendering is shown. This is especially evident in line symbology. However, if the map's symbology was originally designed in ArcMap, the appearance may be different in ArcGIS Pro. In ArcGIS Pro, there is a significant difference between 2.6 points (left) and 1.9 points (right). This results in greater accuracy of feature placement and symbology. In ArcGIS Pro, the drawing engine can use subpixel coordinates to place and draw features on the map. In ArcMap at 96 dpi, there's no visible difference between these two line symbols at 2.6 points (left) and 1.9 points (right). Lines whose sizes are less than one pixel at a given zoom level or display extent round up to one pixel. This can result in some inaccuracies, particularly in the case of very thin lines or lines with very thin elements, such as cased lines. If the real coordinate of a feature (for instance, a line or a marker) does not lie exactly on that integer coordinate, it rounds up or down. In ArcMap, elements of the on-screen display are specified with integer coordinates. Right: ArcGIS Pro with font antialiasing set to Force. In ArcGIS Pro, these settings are configured within the application's options.īecause the ArcGIS Pro drawing engine uses a different method of enabling text and character antialiasing, and the algorithms used to execute this antialiasing are different, the text rendering and character markers may exhibit some differences when compared with the ArcMap display. Font smoothing settings vary between operating systems.
These settings are set per user and are not configured as part of the application.
In ArcMap, text and character marker antialiasing is controlled by the font smoothing settings configured in the machine's display settings. The following sections describe some of these differences in drawing and why they occur. ArcGIS Pro (right) includes features such as antialiasing to improve appearance.īecause this drawing engine is different from the drawing engine used in ArcMap, there are important differences in the appearance of a map drawn in ArcGIS Pro when imported. ArcGIS Pro uses a high-performance drawing engine to ensure maps and scenes draw quickly with smooth symbols and text.
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