Latest Contributions by DanPatterson_Retired

also posted on http://gis.stackexchange.com/questions/6286/using-python-lookup-table-to-compare-records-with-existing-geodatabases ... View more

did you rule out those contained in the help files? http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Calculate_Field_examples/005s0000002m000000/ ... View more

both are in the same coordinate system? ... View more

did you rule out Aggregate? http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z00000034000000.htm ... View more

Grief...good catch... ... View more

let us examine how Python is used in the field calculator as indicated from the help files.... http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//005s0000002m000000.htm There is an Expression box, and a Code block, in the code block there is a section for variables and/or imports to be denoted (in this case an import statement) and a  Python function, as denoted by the def If the syntax is correct and the fieldname is enclosed in double !'s then it should work Parser: Python Expression: getRandomValue() Code Block: import numpy.random as R def getRandomValue():     return R.random() can you get this to work in a field?  The error in the previous example is that SYMBOL_weights is not a function ... View more

Tim Couldn't get the polar bear tool to work 🙂  ...but if you are working with graphics, simply draw some circle on the dataframe, right-click on properties, set the anchor point to the middle of the bounding box, specify the centroid x and y and width.  If memory serves, you can do the same thing with points in a shapefile. ... View more

start with the online help http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/An_overview_of_the_Overlay_toolset/000800000009000000/ ... View more

have you have ruled out just deleting the circle and recreating it using the correct radius? ... View more

what did you get running the various options on your sample file? ... View more

contact the producing agency and see if the data exists but just hasn't been posted.  Secondly, you may have to consider limiting your study area if the whole area is a "nice" versus a "need".  You will not be able to produce data for the missing areas since they are quite large. ... View more

shift.... http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000007t000000.htm but why would you want to specify the four corners? ... View more

in future specify your ArcGIS version (ie 9.1, 9.2, 9.3 or 10). this will facilitate appropriate answers to questions since some functionality is added with upgraded versions ... View more

do you have an ArcInfo license? ... View more

enclose your code in code blocks (# in the html editor window) so that indentation can be checked. Include a screen grab so the whole field calculator dialog window can be checked for missing elements (like how you pass the field name to the function and to make sure that the Python radiobutton is checked on) also any further details on the field's properties (perhaps a wrong field type, precision or scale) ... View more