Latest Contributions by JimCousins

I am not completely sure of the details, but what about converting your raster to points (maybe with a reclass to set some thresholds), and then run a spatial join between them, with the match option set to closest? You may need to do some selecting first, to limit the dataset matches. For example, select the raster points <= 15 prior to running the join, so the possible matches are limited to the subset of interest. Best Regards, Jim ... View more

You have coded the accumulative value of a field, so basically record 1 + record 2 + record 3 + record 4....... You should be using the calculate sequential ID or number based on an interval. I see the following steps: 1) get a listing of unique values within the column ( if there are not too many, you could actually enter these into a list in the expression) 2) for each unique value, if the record == the value, run the sequential ID, appending the unique value to it. So if the input column = A, then it runs the code, if not, it goes to the next record, and if it = A, it runs the code.... then it switches to "B" and does the same sequence. Regards, Jim ... View more

We used to automatically apply the NAD_1927_To_NAD_1983_NADCON transformation in ArcMap. We no longer do it, so you'll have to apply it. Open data frame properties. On the coordinate systems tab, click the Transformations button. Depending on what the data frame's coordinate system is, highlight the other one in the top box. In the pull-down (that says None), click it and select the above transformation. Melita Melita, When did this default get altered? Is there an option to re-enable it? Regards, Jim ... View more

I had to rename worksheet to remove spaces, but Get the following as output. I input all values as GCS NAD83. It all looks reasonable. [ATTACH=CONFIG]30886[/ATTACH] Regards, Jim ... View more

You want to do a sequential calculation. Have a look at: http://resources.arcgis.com/en/help/main/10.1/index.html#//00170000004s000000 Towards the bottom is "Accumulative and sequential calculations" Best Regards, Jim ... View more

What about using "Spatial Adjustment" tool to tweak the referencing? This allows for 1 point or many point transformations, and multiple adjustment methods. Regards, Jim ... View more

The FieldInfo() class has a setVisible(index, visible) parameter. Regards, Jim ... View more

What about converting your raster to polygon, and then running a polygon to polygon analysis? This also provides you with additional attribute capability. Regards, Jim ... View more

If you open the results tab, and view the messages from the tool, are there any errors or warnings? Regards, Jim ... View more

Start here: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#/Understanding_drainage_systems/009z0000005m000000/ the next pages go through the entire process for you. Best Regards, Jim ... View more

I expect that every element is tracked by a lower left and an upper right. When you rotate this rectangle, it changes the min / max values associated with the element. Regards, Jim ... View more

Select the North arrow >> Properties >> Size and Position. Under the Anchor Point Graphic, choose the center point, and rotation should behave as you need. Best Regards, Jim ... View more

Angela, Add a field of type Integer, and calculate it equal to the FID. This field will be accessible as the Unique ID Field. Best Regards, Jim ... View more

When you do the reprojection, you have the option to choose the cell size under the "Environments" button at the bottom. Regarding the resampling, the appropriate selection depends on your data: "The NEAREST and MAJORITY options are used for categorical data, such as a land-use classification. The NEAREST option is the default since it is the quickest and also because it will not change the cell values. Do not use NEAREST or MAJORITY for continuous data, such as elevation surfaces. The BILINEAR option and the CUBIC option are most appropriate for continuous data. It is not recommended that BILINEAR or CUBIC be used with categorical data because the cell values may be altered." Best Regards, Jim ... View more

I tend to use the "Try Except" statement in python. It is a simple bit of error handling that allows an exception (error) to be stepped over if you choose, and the rest of the data to process. http://resources.arcgis.com/en/help/main/10.2/index.html#//002z0000000q000000 Best Regards, Jim ... View more