Skip navigation
All Places >

Coordinate Reference Systems

Log in to follow, share, and participate in this socialgroup.

Recent Activity

Does anyone know where I can find the equation to put into Excel that will convert CT State Plane coordinates to Lat/Lon?  I know ways to programmatically do this using ArcGIS but have a scenario/workflow where we may need to do this from within Excel.  Thanks!
in Coordinate Reference Systems
Hello all, I've got a real head scratcher. I've received a pdf of a CAD drawing in Southern Africa. I don't have access to the CAD files themselves, just the .pdf. As it has a reference grid I though I'd georeference it. However, although the coordinates look similar to UTM coords they are both negative and the X is labelled Y (and Y labelled X).… (Show more)
in Coordinate Reference Systems
I realize there are already many questions and answers out there related to this issue.  However, I continue having a difficult time pinpointing exactly which transformations I should use.    Essentially, I have GPS data that was post processed against the local CORS stations in Pathfinder Office using the reference position from base provider… (Show more)
I have a problem when I try to use Project tool. when I try to reproject a shape file to other GCS the tool not Auto choose Geographic transformation. that in using ArcGIS 10.1 . But when I use ArcGIS 10.2.2 and with same GCS it auto choose the appropriate geographic transformation. 
Hi all,   I have received an hardrive from a geophysical survey with the following data:   MBES- DTM : Density xyz   xyz file                        DTM xyz        xyz file                        Slope xyg       xyz file   MAG : text file SSS:   Mosaic: .tif and .twf file            Raw data: xtf data   SBP:  .sgy files   I do not know… (Show more)
in Coordinate Reference Systems
Hello everyone.   I'm pretty new to using GIS. I'm building a map on top of the imagery basemap provided with ArcMap. When I went to add my first layers, a warning popped up with the titles "Geographic Systems Warning." It says "The following data sources use a geographic coordinate system that is different from the one used by the data frame you… (Show more)
in Coordinate Reference Systems
Display XY Data not honoring coordinate system of input coordinate system - I have tabular data with lat lon columns in an unknown geographic coordinate system I need to bring into ArcMap and compare to a feature class with a known coordinate system.  I used Display XY Data three different times, each time specifying a different geographic… (Show more)
in Coordinate Reference Systems
I'm currently developing a Python Module to reproject shapefiles and CAD drawings (DWG, DXF) that have known and unknown coordinate systems. The code below deals with the known coordinate systems of the shapefiles of which there are 1500 shapefiles and 3600 CAD drawings. I realize that there are limitations in being able to identify the correct… (Show more)
I have a feature dataset (SpaceUse) with two feature classes (floor_space and int_walls).  All interior wall features are within floor_space polygon features, both have the same extent.  When I import them into SDE, floor_space draws fine, but int_walls throws the "The specified coordinate exceeds the valid coordinate range" error.  I'm using… (Show more)
Load more items