Is there a NTv2 grid shift file or ESRI transformation to go from NAD83 - CSRS v3 2010 Epoch to NAD83-Original? I am trying to project my files from NAD83 - CSRS v3 2010 Epoch to NAD83 UTM 17N. Cheers, Richard
I may be overlooking something, but the Alaska geographic transformations do not seem to be working in ArcGIS 10.4. In going from NAD27 to NAD83, I'm using the transformation: NAD_27_To_NAD_1983_Alaska When I open an mxd project in ArcGIS 10.2, the NAD27 polygons are projected on the fly correctly to their corresponding NAD83 positions.…(Show moreShow less)
I would like to plot several coordinates that are on a datum not included in the ArcGIS coordinate system library (10.4.1 for Desktop). The datum is the Israel-Jordan Boundary Datum of 1994, which was created between the two countries in order to delimit their boundaries with accuracy and precision. The technical documents submitted to the UN…(Show moreShow less)
I have downloaded a SST image of the United Kingdom. It is in PNG format with no coordinate system. I know the dimensions of my image and its lat/long range. However, i'm not sure what approach to take in Arcmap to set the co-ordinate system. There is a web-page describing how to convert image co-ordinates to latitude/longitude but it is…(Show moreShow less)
Display georeference toolbar in arc map. Add your image (Add Data). Click the Add Control Points tool . Click a known location in the unreferenced image to add the first coordinate in the link. (the corner of image) Right-click the image and click Input Lat and Long. Type the reference coordinates on the Enter Coordinates dialog box Click…
Hello, As I am preparing to gathering a lot of shapefiles that I am going to have to export them to my geodatabase. The Geodatabase will have it's NAD_1983_UTM_Zone_13N (26913). I have a lot of them that are in GCS_WGS_1984 (4326) and some GCS_North_American_1983 (4269). My question to you all. Should I project the GCS_WGS_1984…(Show moreShow less)
The projection from GCS on one dataum to a PCS based on another datum can be done in one step using the Project tool or export from ArcMap. You just need to have set the correct transformation to get the datum shift sorted out.
Hello, I would like to transform data from NAD83 to NAD27 using NADCON first then to the NAD83 HARN.
I don't see this combination in the Transformation options. When I try to use NAD_1927_To_NAD_1983_NADCON and NAD_1983_To_HARN_Wisconsin in the Project Geoprocessing tool it says it's an invalid transformation. Does anyone know how to string these two together to do this double transformation?
ArcDesktop 10.2.2. Coordinate system: WGS84. I want to view the map of the world to that the centre is at 180 degrees instead of zero - as discussed by Chris Fox in this post Draw geometries accross 180 . He mentions that this can be done by customising the spatial reference but I can't find the controls to do it - can someone walk me through…(Show moreShow less)
Thanks - got there in the end. Dan's method seems to refer to v8 & 9 - my Catalogue tab doesn't seem to metion coordinate systems. The "Copy and Modify" method was not sufficiently intuitive for me so, for anyone else with this question, here's what I did: 1. Make a new copy of WGS84.prj in windows explorer 2. Open it in a text editor and…
I would like to have a discussion regarding which coordinate system(s) are best, and/or are typically used, for measuring both the lengths and areas of mapped features at various scales, and addressing the specific limitations/cautions/concerns that arise from using any single coordinate system for this type of work. This can range from the…(Show moreShow less)
In some cases it is best to read the tool's help... for example Generate Near Table—Help | ArcGIS for Desktop for long distances geodesic would be best large areas would be a challenge, but you probably wouldn't be expecting extremely accurate results in any event. I tend to use UTM if EW spacing is less than 6 degrees, a MTM (modified…
I want to geo-reference a series of map, digitize features using polygons, and calculate accurate area measurements. I encountered the following issue: After georeferencing a map image (.png) using the lat-long posted on the four corners of the map and projecting it using an appropriate UTM projection (WGS_1984_UTM_Zone_29N), I noticed that the…(Show moreShow less)