NIM064280 for ArcIMS

Bug ID Number	NIM064280
Submitted	January 18, 2011
Last Modified	April 2, 2025
Applies to	ArcIMS
Version found	10.0
Operating System	Windows OS
Operating System Version	2003
Status	Will Not Be Addressed

Additional Information

We apologize that we were unable to address this issue within the current product support cycle. If the issue continues to affect your work in a supported release, please contact Technical Support.

Workaround

Specify the scale in Map Units per pixel instead of relative scale.For example to specify 1:20000000000 in map units per pixel, assuming dpi=96 and map units = decimal degreesmapunits per pixel = 20000000000*0.000265/ 111195 = 47.664014Example usage in AXL: LAYER type="featureclass" name="stores" visible="true" id="1" maxscale="47.664014"Here is help topic that shows how to calculate scale in map units per pixel. http://help.arcgis.com/en/arcims/10.0/mainhelp/mergedProjects/ArcXMLGuide/elements/layer.htm######## * Map units per pixel refers to the number of meters, feet, or decimal degrees represented by one pixel in a map. To convert from a relative scale to map units per pixel, the size of a pixel must first be calculated. The formula for finding the number of meters in a pixel is 0.0254 / dpi where: o The value 0.0254 is the number of meters in an inch. o Dpi is the dpi set in the ArcIMS service or request. If no dpi is set in the service or request, the dpi is assumed to be 96. As an example of calculating pixel size, if the dpi is 96, the pixel size is 0.0254 / 96 or 0.000265 m. Once the pixel size is known, the relative scale can be converted to map units per pixel: 1. If the scale is in meters. To calculate the number of meters per pixel, take the relative scale and multiply by the pixel size (0.000265). For example, if the relative scale is 1:24000, then the number of meters per pixel is 24000 * 0.000265, or 6.36 meters. 2. If the scale is in feet. Do the calculation for meters (#1). Multiply the result by 3.28 (the number of feet in a meter). For example, if the number of meters per pixel is 6.36, the number of feet per pixel is 6.36 * 3.28, or 20.86 feet. 3. If the scale is in decimal degrees. For these calculations, the Earth is assumed to be an exact sphere with a circumference of 40030.174 km. One degree is 111.195 km (40030.174/360 degrees), or 111195 meters. To calculate the number of degrees, first do the calculation for meters (#1). Next, divide the result by 111195. For example, if the number of meters per pixel is 6.36, the number of degrees per pixel is 6.36 / 111195, or 0.0000571968.###########