Latest Contributions by ChuckTurlington

‎04-25-2017

Hello, I am using ArcMap 10.4.1. I need to import a coordinate. I have ArcMap coordinates set to geographic->World->WGS 1984 (I assume this coordinate system is a true Geographic 3D type that is not projected). The coordinate that I am importing is in latitude-longitude format. Do I have to adjust any settings to tell ArcMap that the coordinate is in lat-long format ?

‎03-26-2017

Dan, Yes indeed, thanks for that feedback. The 3d polyline was adjusted in its Z value using the Adjust 3DZ function. However, the change was not obvious in ArcMap. I did not see in the attribute table or the properties of the object in ArcMap, having different units or Z values. But the Z value change was observable in CAD. Is it possible to confirm the change in ArcMap ?

‎03-25-2017

Yes, thank you, I used Field4*0.3048 which gave the correct results. I suppose if I had linework that I needed to adjust the Z value for, then the Adjust 3D Z method is the preferred way ?

‎03-25-2017

Dan, I see what you are saying. I selected in Arc Toolbox->Data Management Tools->Feature Class->Features->Adjust 3D Z. I did not see an obvious change but did get a successful response that the adjustment was made. Since I am working with points in attribute tables, I think you said the above process will not work for tables but I can use the Field Calculator to calculate the metric units in a new or un-used column of the attribute table. Please confirm if I am now understanding or if there is still some part I may be missing.

‎03-25-2017

Curtis, Thanks for forwarding to the proper forum, I was unfamiliar. Will look forward to their responses.

‎03-25-2017

Dan, The example involves python programming which I am not familiar, unfortunately. I did try to copy and paste the lines of code into the python window but got an error on line 1. But if the transformation/projection is complete in every other way, it is just a matter of converting the Z units to meters in excel, if I am understanding correctly.

‎03-25-2017

Hello, I am using Arc Map 10.3. When I change coordinate systems by selecting Data Management Tools->Projections and Transformations->Project-> fill-out dialogs for XY and Z coordinate to change from State Plane Nad83 Us Feet, NAVD88 to a Geographic WGS84, WGS Ellipsoid; I believe ArcMap is performing both a transformation to a different horizontal datum and a projection from a flat grid based state plane system to an elliptical geographic system. Is my understanding correct or am I missing something.

‎03-25-2017

Dan, Yes, I believe per the screen shot below, that the Z-Values are true. If I understand, those are turned on or off using the Environments tab in the Transformation of Project, set as "Same as Input". Is my understanding correct?

‎03-25-2017

Dan, Thanks for that feedback. So if I understand correctly, the actual units will not update, but the Z-Coordinate I selected will update which proves to be the case per my example project. If I "transform from a state plane system such as NAD83, to a geographic system such as wgs84, that involves both a transformation and a projection. Am I correct to assume that is the case ?

‎03-25-2017

Dan, In arc catalog I created a file database, then imported my points into the database as a feature class. Then I ensured the feature class had a Z coordinate to start with (NAVD88). Then I performed the transformation/projection from NAD83 Intl Feet to WGS84 meters. The XY appeared to change properly to WGS84 but the Z values were still showing feet values. What am I likely doing wrong if I want to get meters as my Z values, assuming it is possible?

‎03-24-2017

Dan, Ok, if I understand, my project tab "Z Coordinate System" found when populate Output Coordinate System (see screen shot below), is the same as the "Vertical Parameter Button" you are referring ? If I am correct, my elevation values are not changing from feet to meters. I have an elevation, for example of 25.36', that value persists after the transformation (SC Nad83 Intl ft to WGS84 m). What else am I likely missing ?

‎03-23-2017

Dan, I am not getting the Vertical Parameter button. Below is a screen capture of my project dialog for reference. Perhaps I am missing something or do not have the correct version of ArcMap ?

‎03-23-2017

Hello, I am using ArcMap 10.3. I selected the Projections and Transformations under Data Management Tools to change a NAD83 state plane coordinate to the WGS84 coordinate system. I filled-in the Output coordinate system and then the under the Z Coordinate System tab selected WGS 1984. Under the Environments tab I selected Z Values "same as input". I thought ArcMap would have created the new data to a vertical metric unit but the new data still has the US feet value. I noticed a past post states that only ArcMap 10.4 has the vertical projection capability. If this is the case, what is the "Z Coordinate System" tab for and is it possible to get my vertical elevation values projected from us feet to meters ?

‎01-15-2017

Hello, I am using ArcMap 10.3. I have a figure that I would like to fade the base map background to allow text and line work to be more visible, to increase contrast. I do not see a key selection for this. Is it possible to fade a base map ?

‎10-19-2016

Hello, I am in the attempting to understand the details behind the ellipsoid and geoid concepts as they relate to datums. I understand some of the basic concepts of the ellipsoid and geoid, and my research suggests that the ellipsoid is defined with an anchored point based on the International Terrestrial Reference Frame (ITRF). I have to assume this refers to an origin anchor point (earth center) but have to ask if this understanding is correct and is it one anchor point or several that are used?

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Date Last Visited	‎10-17-2021 11:41 PM

My Ideas

Latest Contributions by ChuckTurlington

ARCMAP-LAT-LONG IMPORT

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

Re: ARCMAP-TRANSFORMATION AND PROJECTION

Re: TRANSFORMATIONS AND PROJECTIONS

ARCMAP-TRANSFORMATION AND PROJECTION

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

Re: TRANSFORMATIONS AND PROJECTIONS

TRANSFORMATIONS AND PROJECTIONS

ARCMAP-FADE BASEMAP

ELLIPSOID-ANCHPOR POINT

Re: ACRMAP-ELLIPSOID SURFACE

IMPORTING CSV FILE