topic Re: The project came with coordinates in scientific notation, how to solve it? in AutoCAD Forum

The project came with coordinates in scientific notation, how to solve it?

hedy_gabriel — Fri, 11 Aug 2023 13:51:14 GMT

I received a drone flight project, but the coordinates came in scientific notation (2.817E+07, 2.7333E+08). Is there a way to transform/georeference or convert the coordinates to SIRGAS 2000 UTM 22S? I tried to do it using QGIS, but it didn't help much because the project didn't come in a specific coordinate system. I admit I don't understand much about the subject.

Re: The project came with coordinates in scientific notation, how to solve it?

user181 — Fri, 11 Aug 2023 14:04:35 GMT

Deleted - I read the question wrong

Re: The project came with coordinates in scientific notation, how to solve it?

ChicagoLooper — Fri, 11 Aug 2023 14:24:41 GMT

Hello @hedy_gabriel

Sao Paulo?

Yes, you can do it with plain vanilla AutoCAD, but Civil3D or Map3D would be much easier. Do you have one of those AutoCAD versions?

If you upload you file or name the city where you project is located, the forum will evaluate the location and provide a suitable workflow.

Re: The project came with coordinates in scientific notation, how to solve it?

hedy_gabriel — Fri, 11 Aug 2023 14:03:49 GMT

i already have changed the units, but, the coordinates stills in scientific

Re: The project came with coordinates in scientific notation, how to solve it?

hedy_gabriel — Fri, 11 Aug 2023 14:05:59 GMT

no, my autocad it's only the 2018 version and also i have dwg trueview

Re: The project came with coordinates in scientific notation, how to solve it?

RobDraw — Sat, 12 Aug 2023 18:23:01 GMT

Are you referring to the coordinates in the status bar at the bottom of the screen?

That format shows when you have very large numbers and AutoCAD cannot display all of it. The E stands for exponential.

If you are referring to different coordinates units, please show what you have.

Re: The project came with coordinates in scientific notation, how to solve it?

ChicagoLooper — Sat, 12 Aug 2023 19:37:10 GMT

@hedy_gabriel wrote

<<....the project didn't come in a specific coordinate system...>>

Your drone survey has a coordinate system, even if you don't know what it is or how to determine which one it's using.

All transformations are from coordinate system A to coordinate system B, hence the term transformation. If you only know your target coordinate system (coordinate system B), then no procedure can help you because you don't have a beginning CS.

At this point, you need to determine the native coordinate system the drone pilot used when he flew the survey. Since you don't know it, you'll need to ask the drone pilot or figure it out on your own.

If you run QGIS (I don't use it I use other GIS programs) you could try adding the survey to a clean, brand new QGIS drawing and let the program adopt (or inherit) the native CS of the survey. Once it's in QGIS, you can do two things: (a) look up the coordinate system after your image has been inserted--Since it's a brand new drawing, QGIS will read and use the native CS when inserting the image (b) turn on QGIS's satellite basemap and compare your image to the satellite basemap (your image should be consistent with the basemap).

Next, while still in QGIS, you can perform an EXPORT on the image. Make sure you re-project it to UTM84-22S, also known as EPSG 32722, during the export (this is the target CS you mentioned in your opening post).

If you can't add your in image to QGIS or unable to re-project it to UTM, then you'll need to upload your image so the forum can do it for you. If you can't upload, you'll need to use a file sharing site so it can be downloaded.

This your site, correct?

BTW, the coordinates you mention are not scientific notation--the units might be meters but I'm not sure. Can you share your survey?