Latest Contributions by HeatherSmith

‎04-25-2022

Hi @CarlyConticchio1 I recommend North America Albers Equal Area Conic. If any of your analysis involves area or distance measurements, you'll want an equal area projection. As @jcarlson said, your map frame is probably using the same coordinate system as your data. But you should probably check to make sure it is. If you are using ArcGIS Pro, you can check it here: When you Geoprocessing tools, they will use the coordinate system of the input data to compute the analysis.

‎03-29-2022

Are you a professor or instructor in a university or college? We want to learn more about how Learn ArcGIS lessons are currently used in higher education, and how they can be improved to better meet your needs as educators. You can help us by taking a few minutes to answer some of our questions and provide some feedback. Learn ArcGIS lessons are hands-on tutorials ranging from 20 minutes to 4 hours in length. They teach GIS skills using real-world scenarios. All data is provided and lessons are kept up-to-date with current software. Lessons are published by Esri under a Creative Commons license. Reuse and adaptation for educational purposes is permitted. You can find the survey here: https://survey123.arcgis.com/share/3413a9258bb44587975a1dd3beb92a67

‎03-28-2022

Hello @Landoexist , The dot size is part of the symbology, and symbology is not permanent with the data, it is only applied in the map as a way of displaying the data. So it is expected that the symbology disappears and returns to its default state when you remove the data and re-add it to the map. This will be true in ArcMap, in ArcGIS Pro, with Python, or any other option. Add your data to a map, symbolize it, and save the map. Find out from your teacher how they want you to submit the assignment. It might be a pdf of a map showing the symbols and the legend. It might be the .aprx map document file zipped up with the data. It won't be just the data itself, because the data alone cannot store the symbology and legend. You can symbolize your data by size in ArcMap usiong either Graduated symbols or Proportional symbols. Here is an example of using Graduated symbols in a lesson: https://learn.arcgis.com/en/projects/get-started-with-arcmap/#subsection-3 Extra information: You may also be interested in saving a layer file. This file will store the layer properties for a dataset, including its symbology.

‎03-04-2022

Hi @RyanChallender I am not sure about this question. I suspect that the answer they are looking for is that projections seek to preserve some properties from distortions (although they can't preserve them all). However, I don't think it's accurate to say that a GCS distorts properties. I think what they probably mean is that if you draw a map with a GCS, then properties will be distorted. Technically, you can't draw a map with a GCS, because it is impossible to draw the round earth on a flat surface without a projection. So when you tell ArcGIS to make a flat map with a GCS, it is forced to choose a projection (otherwise it wouldn't be able to display your data at all). It draws using a pseudo Plate Carrée projection. This is just latitude and longitude represented as a simple grid of squares. It is called pseudo because it is measured in angular units (degrees) rather than linear units (meters). This projection is easy to understand and easy to compute, but it also distorts all areas, angles, and distances. So yes - if you choose a GCS for your map, everything will be distorted. However, it's not the GCS that is doing the distorting, it's the pseudo plate caree projection that is used behind the scenes. I explain all of this better in this article: https://www.esri.com/arcgis-blog/products/arcgis-pro/mapping/gcs_vs_pcs/ Hopefully it can make this clearer.

‎11-08-2021

@StephenKing3 I wasn't sure of the answer to this one, so I asked John Nelson, who recently wrote about a similar topic (which was possibly the inspiration for your question). Here's what he had to say: "In Pro, the scale of a layout (so its reference scale and any scalebar you put in a layout) corresponds to the center of the map. I think the answer I would give in this case is, ‘it depends but leads towards sure.’ Some of the dependencies that come to mind: The latitude where this person is mapping will have an impact on how inconsistent the scale would be from the top vs the bottom of the map. More extreme latitudes will amplify it. Just a quick visual spot-check in the northern USA the scale distance difference was imperceptible to my crusty eyes. At the scale they are mapping, (1:450,000) the scale difference across the map is negligible. If it’s an engineering schematic where a map reader is actually using the scalebar to do precision planning and measurements I’d say no. But I doubt that’s the case. They can always add a small text note next to the reference scale and scalebar on the layout indicating that the scale corresponds to the center of the map and there can be minor, probably imperceptible, differences in scale at the top and bottom of the view."

‎11-05-2021

Hi @StephenKing3 I recommend using a projected coordinate system instead of WGS 1984. It's impossible to draw the earth on a flat map without a projection. So when you set your map's coordinate system to a WGS 1984, the map that you see in ArcGIS is still projected. It is drawing using the "Pseudo Plate Caree" projection. It's called pseudo, because it reads out the coordinates in latitude and longitude, instead of meters, but otherwise, it's the plate caree projection. You can use a scale bar with that projection. However, I still recommend choosing another projected coordinate system that is more suitable for your map. Here's the information about plate caree distortions: "The plate carrée projection is equidistant along any meridian and the equator. Shape, scale, and area distortion increase with the distance from the equator. North, south, east, and west directions are always accurate, but general directions are distorted, except locally along the equator. Distortion values are symmetric across the equator and the central meridian." You can find some advice and tools for choosing projections in this lesson: https://learn.arcgis.com/en/projects/choose-the-right-projection/

‎10-29-2021

Unfortunately I don't have any textbook recommendations, but you might check out this learning path: Learn Python with ArcGIS Notebooks https://learn.arcgis.com/en/paths/learn-python-with-arcgis-notebooks/

‎10-19-2021

You are welcome!

‎10-15-2021

Hi @CarmiNeiger I can't reproduce this problem. It's possible that something got disconnected with the map package. The data is stored inside of the Scenario3_PredictedJobGrowth.mpkx file, but once you open this package it creates a new folder. You'll probably need to delete this folder to fix things. I recommend these steps: 1. close ArcGIS Pro. 2. Go to C:\Users\<your user name>\Documents\ArcGIS\Packages and delete the Scenario3_PredictedJobGrowth_d0e233 folder. 3. Delete the folder you downloaded for the lesson. 4. Start the lesson again, re-downloading the data. I hope this resolves the problem!

‎08-13-2021

Thank you for reporting this @PeterKnoop ! The link should be fixed late next week.

‎07-27-2021

Good question! You are correct, but here's a bit more explanation: Web maps (unlike maps in ArcGIS Pro) can't have a different coordinate system than their basemap. Because most basemaps are in Web Mercator, this means that most web maps also have to be in Web Mercator. In your case, yes, the web map will always be in Web Mercator, and when you view the web map in ArcGIS Pro, you can temporarily change its display. This lesson shows you how to make web maps in other coordinate systems, by creating and publishing simple basemaps: https://learn.arcgis.com/en/projects/make-a-web-map-without-web-mercator/

‎07-27-2021

Hi @BrittanyBurson Yes, almost all Esri basemaps use the Web Mercator projected coordinate system. You can't change the coordinate system (CS) of a basemap, although you can make it display in another CS by changing the CS of the map. (what we call projection-on-the-fly). The recommended best practices for this scenario are outlined in the blog I linked to above - if you walk through those steps they should cover your scenario. If you have a locally hosted basemap in your state plane CS, using it instead of Esri basemaps will prevert the warning, but it shouldn't be necessary. We have transformations available between state plane coordinate systems and web mercator, so you should be able to resolve the warning by following the steps in my blog.

‎07-26-2021

You just opened a project in ArcGIS Pro and a little message popped up, warning you that a datum transformation cannot be found and that the data may draw with an offset. If that sounds scary or confusing, read this article on ArcGIS Blog to find out why you are seeing it and what you can do: https://www.esri.com/arcgis-blog/products/arcgis-pro/mapping/transformation-warning/

‎07-15-2021

You will need an account to sign in to ArcGIS Pro. If you don't have an account through your work or school you can sign up for a free trial account here: https://www.esri.com/en-us/lg/training-and-services/learn-arcgis-education-trial If you have an account but are having trouble licensing ArcGIS Pro with it, see the instructions here: https://community.esri.com/t5/learn-arcgis-documents/frequently-asked-questions-for-learn-arcgis/ta-p/907371#toc-hId--1424541768

‎07-02-2021

I am not sure of the best solution for updating the layer itself, but you may find the workflow smoother if you work with a web map instead. You can create a webmap in ArcGIS Online that contains your symbolized layer. Add that web map to your project in ArcGIS Pro. Whenever you want to push changes from ArcGIS Pro to ArcGIS Online, go to the Share tab on the ribbon. In the Manage group, click Save Web Map. Whenever you want to pull changes from ArcGIS Online to ArcGIS Pro, go to the Catalog pane > Project tab > Maps folder. Right-click on the web map and choose Update. The link icon on the map icon tells you that it's a link to a web map, instead of one stored locally in the project. If you take this method, any symbology changes you make will be applied to the layer's instance in that map, but not to the layer itself. So if you need to use this layer in lots of different maps, this workflow may not work for you.

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My Ideas

Latest Contributions by HeatherSmith

Re: What coordinate system should I use if I am mapping all of North America?

Survey for teachers in higher education

Re: Change the size of points according to the attribute information

Re: Geographic Coordinate Systems Vs. Projected Coordinate Systems Question?

Re: Map scale and scale bar

Re: Map scale and scale bar

Re: Textbook Advice for Instructor for Python and/or ArcGIS API for Javascript

Re: Missing exercise data in https://learn.arcgis.com/en/projects/visualize-business-growth-by-industry/

Re: Missing exercise data in https://learn.arcgis.com/en/projects/visualize-business-growth-by-industry/

Re: Broken Link in "Get started with ArcGIS StoryMaps"?

Re: Transformation warning: What does it mean and what should I do?

Re: Transformation warning: What does it mean and what should I do?

Transformation warning: What does it mean and what should I do?

Re: 如何注册arcgispro账户

Re: Sync Feature Service Symbology in Pro Project with Changes Made in ArcGIS Online

New tutorial series: Cartographic creations with w...

Re: Super newby here

Re: Can someone help how to replicate this graph?

Choose similar colors to map similar things

Re: Color connotations and associations