Difficulty with changing projection

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10-22-2018 10:01 PM
VeraKhazanova
New Contributor

Can someone please help with this very odd projection related problem I'm having?

I've received an Excel file with data, the coordinates are available in the attached sheet. 

The coordinates are most likely in the 'WGS_1984_UTM_Zone_14N' coordinate system. I've tried to verify this by iterating through all the 130 UTM projections and selecting the one that plotted a control point in the place I expected it to be. 

I've created points from all the coordinates in the attached sheet and spent all day trying to project these points into the regular 'GCS_WGS_1984' system.

I cant even get these plotted points to line up with polygons that are in the same UTM projection! 

The Project tool is failing with a '9999999' error code. The original projection is defined, so that's not the cause

I've tried change the projection for a single point's coordinates as done here: Coordinate transformation in arcpy 

In the past, I've never had a problem changing the spatial reference from 'WGS_1984_UTM_Zone_14N' to 'GCS_WGS_1984' using the Project tool.

How can I plot the attached points in ArcMap and project to  'GCS_WGS_1984'?

 

The challenge is that it took a month to request the data and these coordinates are all I have to work with.

 

I'd really appreciate if someone can help figure this out.

Thank you

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V_StuartFoote
MVP Frequent Contributor

Those are in Texas State Plane - South Central, in US Feet (FIPS 4204), look up the projection details if you actually need to convert from NAD83.Excel sheet imported to table, and displaying xy data

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14 Replies
DanPatterson_Retired
MVP Esteemed Contributor

hmmm there are about 10,000,000 meters from the equator to the Pole

13,865,340. can't be right if these values are in meters and you think you have a utm projection

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VeraKhazanova
New Contributor

Here is an example:

"X LCIM": 277150.548

"Y LCIM": 3296160.057

Which translates into  29.775714, -95.305089.

The above is given for 721 Rouse St, Houston, TX.

Odd, right?

Does their notation of "LCIM" next to the coordinates ring a bell at all? I could't find that abbreviation anywhere. 

Would it be possible to narrow down to the projection they're using if it's not UTM. 

Should I focus on Foot based systems?

Thank you

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DanPatterson_Retired
MVP Esteemed Contributor

Lambert conformal?  I couldn't find one either... so,

  Melita Kennedy anything projection-wisek  in that area that would have those numbers?

Your best hope is Melita

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NeilAyres
MVP Frequent Contributor
X-COORDY-COORD
3150059.57213865340.77

Dan is right. Are you sure that these numbers are not feet instead of metres?

Where do you expect these coordinates to sit?

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VeraKhazanova
New Contributor

Hi Neil, the associated address is 8320 Sunbury St, Houston Texas.

So the coordinates are: -95.273127, 29.82195.

Does that help? 

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DanPatterson_Retired
MVP Esteemed Contributor

Albers?  Melita listed 3 in this thread

Projected Coordinate System for entire Texas (for area calculation using sqmi) 

and to check, you have ruled out that horrid Web Mercator one that the webbie apps all use?

VeraKhazanova
New Contributor

Thank you Dan! Will check and let you know.

Since I don't fully understand how ArcMap deals with showing features that are in different systems at once, 

Is it safe to assume that once a set of XY coordinates are plotted under different selected projections, I could correctly select the projection that put the test point in the right place on the world basemap in arcpy?

I'm using Arcpy to iterate over the 5000 projection systems, plotting the XY points. I've only done this for the 130 UTM systems last time. Then I exported all the points to a KMZ file and Google Earth showed one of the results in the right place. 

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NeilAyres
MVP Frequent Contributor

"I'm using Arcpy to iterate over the 5000 projection systems, plotting the XY points."

 

Pardon!!, that's brave. If you find one that fits, go for it!

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V_StuartFoote
MVP Frequent Contributor

Those are in Texas State Plane - South Central, in US Feet (FIPS 4204), look up the projection details if you actually need to convert from NAD83.Excel sheet imported to table, and displaying xy data

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