Latest Contributions by curtvprice

‎04-02-2021

I agree: Spatial Join (within, closest, whatever works) Select layer for missing values Add Join with spatial join output by feature ID Calculate Field to fill in missing values

‎04-02-2021

You want specific latitudes or longitude lines, not a regular lat long grid ("graticule") so I don't think fishnet (or graticules and grids - a property of the data frame) are what you are looking for. Here's a fairly simple approach: Create an excel sheet with lat long points at (or beyond) the ends of the lines you want to draw (long-lat in decimal degrees) and create points (Display XY Data). Be sure when you load the data to specify a GCS (the default in ArcMap is the data frame coordinate system). Then create a line feature class and use the ArcMap editor to draw the lines, snapping to your points. Or, you could create a line feature class in GCS, and use the ArcMap editor to type in the XY coordinate vertices (with a data frame set to GCS so you could see what you were doing). Any other olds remember doing this by writing AMLs using the GENERATE command?

‎04-02-2021

This used to be a bigger deal and the software keeps getting better at doing these things for us. However, I really like to avoid unnecessary projections and especially geotransformations when possible to 1) maximize performance and 2) geotransformations (like nadcon) are really warps, not mathematically defined, so you can introduce error going back and forth a lot. So when I set up a web feature service I recommend using WGS84 Web Mercator, and project the data when I copy back down to desktop. I am curious what others have to say.

‎04-02-2021

It sounds like to me like they are the same coordinate system, just the labeling is different. This sometimes happens with datasets created from different software or versions of software. If they really are the same, you can use the Define Projection tool to define them both to WGS 1984 (to find it in the dialog search for 4326). May want to work on a copy if you are not sure about this.

‎03-31-2021

This can be done by creating a table, adding fields, and adding data using a cursor. The easiest way is to do this in Python using the Calculate Value tool. However, if you are in a hurry, you can use the Calculate Value tool to just spit out the values in to the messages stream, use the expression (the things in % are all model variables, %n% is a built in one that counts loops though you could use any model variable to identify results): "Result {}: {} {} {}".format(%n%, %zscore%, %index%, %pvalue%) and then copy and paste the messages stream into a text editor and clean it up to make a csv to load into excel. Sometimes brute force is easier than writing a bunch of code. UPDATE: I fixed up the expression above and added another variable to identify the results for each loop.

‎03-28-2021

The issue is file locking. When you create or access data in your gdb, layers are created in memory that are pointing to your data and create a file lock that prevents deleting. Are you deleting all the layers and data before trying to delete the workspace? Even if you do that it can be challenging.

‎03-27-2021

The model variable %scratchGDB% or %scratchFolder% will be replaced with a current writable location, normally a GDB or folder named scratch in the current project folder. For details, see the help for these environment variables.

‎03-27-2021

Have you compared the contours of your geo-registered quads? If there was anything major it would probably be visible doing a visual comparison of contours. Honestly I wouldn't expect the landscape to change that much over 100 years to exceed the error between the different methods of creating contours.

‎03-27-2021

I found a paper about this. It sounds like it doable but problematic, remember that you are probably talking about three different methods of creating contours (with different types and amount of error on each). And -- very small changes with respect to the typical USGS quad contour interval. https://www.sciencedirect.com/science/article/abs/pii/S0169555X11002923 Yes, it's a lot of work to extract contours in an automated way, and very image-specific. Usually the least painful way to do it is to digitize it 'by hand' - though I have to say this is much easier using modern tools than on the old big digitizing tablets!

‎03-27-2021

You may get what you need by doing a Region Group on the results and selecting the zone that is connected to the ocean. That sounds a lot more efficient for a simple model!

‎03-27-2021

You can't delete objects that have been validated in ModelBuilder because there are file locks in play. Have you tried using scratchGDB instead of in_memory? That way if you have a crash the scratch data will still be there after the model fails.

‎03-27-2021

What are you trying to accomplish? For just about any use case in the U.S. I believe you would be better off (in my opinion) using elevation data available from 3DEP in The National Map. The 3DEP is built from the best available data which in many cases are much more up to date and detailed than the contour data you are trying to capture. Even if the only data are available are contours, USGS creates their DEMs hydro-enforced, which is a great deal of work beyond just capturing the contour lines.

‎03-27-2021

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‎03-24-2021

Yes, was happening while I was placing points. Basically nothing happens, when it finally does the point appears on the map and the list at the same time. Adding selected worked instantly as I said, but adding points by clicking on the map was equally slow anywhere on the map. This a very small data set: 4300 edges, 3300 junctions. Today I can't reproduce today. May be one of those things where turning it off and turning it on again fixed the issue. I will let you know if it re-occurs and I have something new to report.

‎03-23-2021

The only alternative I can see is to set up ArcGIS Enterprise on your local network and share data using that connect off line. But if you can share with Enterprise is that really "offline"? ArcGIS Pro is a client to services, not a server.

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Date Last Visited	‎06-19-2024 12:10 AM

My Ideas

Latest Contributions by curtvprice

Re: Geodatabase

Re: How can I add reference lines at specific degrees/minutes/seconds?

Re: Layer projection when collecting high accuracy GPS data

Re: Coordinate System Transformation

Re: Creating a table from values and export it

Re: If data exists does not work

Re: If data exists does not work

Re: How can I extract line features from a raster?

Re: How can I extract line features from a raster?

Re: Modeling Tidal Flooding using a DEM

Re: If data exists does not work

Re: How can I extract line features from a raster?

South Dakota Mines GIS Workshops

Re: Enter points on trace network flow is very slow

Re: Creating/Syncing map for Field Maps while completely offline

Re: ModelBuilder SQL Expression Using Inline Varia...

PyCharm Setup for ArcGIS Desktop

Re: Error 010240 - Could not save raster dataset.....

ArcInfo Workstation Commands

Re: Is it possible to configure SA in a Python scr...

ArcGIS Desktop Installation Support

R-ArcGIS

Python Snippets

Coordinate Reference Systems