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5

I certainly wish that more people would be as concerned about the display of digital elevation data as you are. I see so many examples of poorly rendered DEMs that it's somewhat disconcerting. So thank you for raising this question. First, to answer your question of "how can I be sure that I am using a correct setting", I don't think that there is such thing ...


4

Georeferencing is a process where you define which coordinates your image covers. It'll write in the coordinate system of the data frame. Therefore, it does not specify which coordinate system you use, only which coordinates it covers. The tool Define projection (under Data Management --> Projections and transformations) can be used on both vector and ...


3

The short answer is yes, you can make points smaller than 1.0. There could be a few different things going on: (1) Are you in map view or layout view? The map data view may be scaling your points so that they appear the same size as you zoom in. (2) It is very difficult to eyeball the difference between 1.0 and 0.5, for example. On my screen they look the ...


2

To remove polygons that don't have an intersection with lines: Open ArcMap and add the polygons and lines to the table of contents. Locate the Select by Locations dialog and select the ones that do intersect. Switch the selection by going to the selection in the table of contents Right click on the layer name and select 'switch selection'. Start ...


2

The data frame was using a geographic coordinate system which does not allow you to measure an area. I changed the data frame to a projected coordinate system which allowed me to activate the area measure tool.


2

Doesn't the third example script in the link you mentioned do exactly what you want in a single table? # Import system modules import arcpy # Set environment settings arcpy.env.workspace = r"C:/data/Habitat_Analysis.gdb" # Set local variables intable = "FIELD_NAME" outtable = "C:/output/output.gdb/TABLE_OUTPUT" # casefield = "Name" Not used stats = [] # ...


1

If you get a dialog box prompting you to build pyramids, click "No". If they are built automatically, uncheck the option to build pyramids automatically on the Raster tab in the ArcMap Options dialog box.


1

Part of what you're running into is a screen resolution issue. Points can only be displayed down to a certain size relative to everything else, and sometimes values will fall between two distinguishable sizes and get rounded one way or the other on the screen. There are only so many individual pixels on your screen with which to draw everything. This effect ...


1

The size they are represented is also linked to how big your map is when you are exporting it (assuming you are exporting it) so yes a point can be displayed at less than size 1 but it depnds on what you want to do next. However if you have a lot of points and reducing the size doesn't help an alternative that might be worth looking into is the Point ...


1

Have a look at the ListFields function. Note, you'll want to limit your results to numeric only fields, otherwise, you might get an error. So, you may want to use something like the following: int_fields = arcpy.ListFields("C:/data/Habitat_Analysis.gdb", , "Integer") to get a list of all integer fields. then small_int_fields = ...


1

I have found the decision. Convert all *.tab + *.jpg to *.ovr + *.aux + *.jpg. Add all converted files to map in ArcMap. Share map as service.


1

For a DEM, I would expect regular interval (similar to what you get with contour lines). Therefore, I would recommend a linear stretch. Maybe you could just increase the contrast in the area where you have the most data by sacrifying the contrast for the very few very high pixels (summits). So putting your line from the bottom left (0,0) to (6,8) counting ...


1

Assuming the intersecting points were created with a tool like Intersect with join attributes of ONLY_FID (it is imperative that the River OID/FID is recorded in the points for this method to work): Using the tool Summary Statistics with a statistics type of River_FID, Count and case field of River_FID you can obtain a list of the points representing ...


1

I would use a SearchCursor wrapped in a generator to get the summed fields. This is the full workflow: List all of the fields Create a function with a SearchCursor wrapped in a generator Loop through the fields Limit the fields to only those that are necessary with logic and implement the function import arcpy, os fc = ...



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