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Questions tagged [nad83]

North American Datum of 1983, a geocentric datum and geographic coordinate system based on the 1980 Geodetic Reference System ellipsoid (GRS80).

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Procedure of transforming coordinates?

I'm trying to understand the math behind this transformation. I should note that I've been able to perform the transformation using GeoPandas, but I'd like to understand what is going on under the ...
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0answers
44 views

Imported data shifted based on Google Maps

I am trying to import points from a shapefile in QGIS. First, I select the correct coordinate reference system (NAD83 / MTM zone 11) when importing the file, and it imports correctly. I even checked ...
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1answer
69 views

NAD 1983 to NAD 1983 CSRS Transformation

I have data in NAD 1983 Zone 20 and want to transform it to NAD 1983 CSRS Zone 20. I found this source: https://community.esri.com/thread/6772 which states: NAD_1983_To_NAD_1983_CSRS_4 > 1950 ...
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267 views

Converting NAD83 (epsg:4269) to WGS84 (epsg:4326) using pyproj

I'm trying to convert US census data (NAD83) to WGS84. I know the difference between the two is quite minor, but trying to apply the transformation using pyproj does not do anything. e.g.: from ...
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2answers
118 views

In ArcGIS can a feature set use multiple coordinate systems?

I'm new to learning GIS and ArcMap, but have some confusion about coordinate systems. I thought I understood that there are two main types of coordinate systems, Projected Coordinate Systems which ...
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Changing NAD27 to NAD83 in R, Error in proj4string [duplicate]

I am having trouble changing latitude/longitude data (from spreadsheet dataset) from NAD27 to NAD83. I am using R. The spreadsheet has 2 million coordinates so I can't upload the data for you all to ...
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1answer
166 views

Loading NAD83 and WGS84 layers together in QGIS?

I have downloaded parcel files for several counties in Washington State, and am attempting to overlay them on the OpenStreetMap Standard base layer (which is in WGS84 Pseudo Mercator). The majority of ...
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122 views

QGIS 3.0 is showing a point's coordinates in the original spatial reference system instead of the project's spatial reference system

I obtained GPS coordinates of a point to within a couple centimeter accuracy using RTK GPS in the NAD83 Spatial Reference System. This information is included in the QGIS layer file metadata, and the ...
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2answers
244 views

Converting NAD27 Mexico to Lat long [duplicate]

A collaborator has given me coordinates of his sites in NAD27 Mexico. How do I go about converting it to Lat Long? I don't have ArcGIS, but is there a way to do the conversion in that program? Edit: ...
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102 views

Creating USA Vector Grid at 1KM intervals using QGIS?

I am attempting to create a grid in 1km intervals to cover the contiguous United States in order to interpolate various underlying data layers associated with non-uniformly shaped geometries to the ...
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1answer
248 views

HARN NAD 83 to NAD 83

Is there a way to convert HARN NAD 83 to NAD 83? I'm using a software that requires shape files to be NAD 83. This is what I want to convert it to: Projected Coordinate System: ...
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426 views

What's the difference between NAD83(2011) (OGR WKID 6318) and GCS_NAD_1983_2011 (ESRI WKID 6318)?

I just projected a feature class originally in Web Mercator (WKID 3857) to WKID 6318 (ESRI calls this "GCS_NAD_1983_2011") using ESRI's projection tool, and the same feature class to WKID 6318 (OGR ...
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1answer
99 views

Unknown SRS in GeoServer for NAD_1983

I am trying to add a GeoTiff to GeoServer but it is appearing as Unknown in Native SRS. Any idea what could be causing this? Details for projection are. PROJCS["...
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1answer
255 views

Procedure for converting NAD83 to NAD83 1992 epoch (1991.35)?

I am attempting to convert a shapefile from NAD83 HARN / egm96 vertical to NAD83 1992 epoch (1991.35) / NAVD 88 vertical. I have attempted to use NADCON to no avail. I know I can use the Define ...
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79 views

Geographic Transformation in Alaska Between NAD83 (NSRS 2007) and NAD83

What is the best geographic transformation for Alaska to go from NAD83 to NAD83 (NSRS2007)? Esri available transformation for GCS_NAD_1983_NSRS2007 to NAD83: WGS_1984_(ITRF00)_To_NAD_1983 + ...
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1answer
134 views

Geographic Transformation in Alaska Between NAD83 (NSRS 2007) and WGS84

This is a related question to this one asked ~3 years ago: Geographic Transformations in Alaska Between NAD83 and WGS84 We are currently on ArcGIS Desktop 10.4.1 What is the best geographic ...
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3answers
1k views

Performing QGIS Datum Transformation from WGS 1984 to NAD 1983?

Is there a way to transform a shapefile's datum from WGS 1984 to NAD 1983 in QGIS 2.18.0? In the picture I have attached, the green dots are points that were collected in the field using a Trimble ...
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0answers
784 views

Adding UTM grid (NAD83) with 1x1km spacing and label the grid lines?

I'm currently running QGIS 2.18.4 (the latest release). I'm trying to add a UTM grid to my maps, specifically the NAD83 reference system for zone 15N, that hopefully can show UTM coordinates and with ...
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1answer
163 views

XY Coordinates for Points in odd format, not matching any projection

I am trying to match up some data without success. I have a state shapefile from the TIGER/Line and a series of X/Y Coordinates from a St. Louis, Missouri police department (CSV). I am using an ...
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2answers
493 views

When is data created in datums other than WGS84?

I'm trying to understand why we need datums other than WGS84. Since GPS coordinates are relative to the WGS84 ellipsoid what is the advantage of having other datums like for example NAD83. I ...
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2answers
108 views

Define tool is moving my features

I am using ArcMap 10.4.1 and am having an issue with projections. I am digitizing data off of a basemap which had the projection NAD 1927, accidentally I created the shapefile with NAD 1983. I have ...
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1answer
117 views

Reprojecting points in NAD 1983 to LLA (WGS84)?

I've read documentation about using NAD_1983_To_WGS_1984_1 for the entire North American continent or NAD_1983_To_WGS_1984_5 for the 48 contiguous United States but what I'm confused is how can I use ...
3
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1answer
141 views

Converting between two NAD83 Datums

I have Layer 1, which uses the NAD1983 datum (GCS_North_American_1983). I'm trying to add Layer 2, which uses the 1983-2011 datum (GCS_NAD_1983_2011). I assume I have to transform the GCS somehow, ...
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1answer
421 views

Using lat/long NAD83 in XYtool in Arcgis

I have loaded a raster map that uses WGS 84. I want to locate stations/points on this map by using lat/long coordinated from an online map that uses NAD83. Can I just copy and paste the lat/long ...
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1answer
465 views

Converting NAD 83 State Plane Maryland Feet Coordinates from lat/long and vice versa using QGIS?

I need to convert a list of lat/lon points (in.csv file) into NAD 83 State Plane Maryland Feet and vice versa. I know it can be done using ArcGIS, but I only have QGIS. I am also quite new to QGIS....
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2answers
665 views

Conversion from WGS84 to UTM NAD83

If all my data is in UTM NAD83 Zone 10 and I get new data in GCS WGS 1984 do I have to reproject the WGS data to UTM NAD83 Zone 10 for it to align correctly or can I just bring it into an mxd that is ...
2
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2answers
626 views

Coordinate System Mismatch in QGIS?

I understand that coordinate system mismatches between layers is a relatively common problem. Nevertheless, exploring other posts hasn't helped me understand my issue. In short, I have a DEM raster ...
2
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4answers
9k views

Convert PLSS (Section, Township, Range, Meridian) to Latitude and Longitude using R package or Python

I have data in the form of Section, Township, Range and meridian. I have 300,000 data points from all over the USA. Is there any way i can write R or python scripts to batch convert all the points to ...
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2answers
720 views

Is a Helmert transform necessary to convert between WGS84 and NAD83?

I've read things all over the internet which claim that NAD83 and WGS84 are effectively equivalent (with minor ellipsoid differences). However, if I do geodetic (WGS84) -> ECEF -> geodetic (NAD83) ...
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1answer
5k views

Difference between datum and ellipsoid for geodetic coordinates?

Looking at the Wikipedia page for the North American Datum, it seems to imply that the datum is completely defined by the ellipsoid, which defines the major/semi-major axes, flattening, etc. For ...
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1answer
497 views

Do I need to reproject a NAD83 raster (with no projection) before using it with a shapefile that has a specific NAD83 projection?

I am relatively new to using ArcMap, so I apologize for what I guess is a relatively easy question. I working with a gridded PRISM precipitation raster (www.prism.oregonstate.edu), which has a ...
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1answer
178 views

Project to NAD83 (epsg:26912) with projectRaster - gives epsg:2152

I am working with some Landsat 8 images from the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. I am processing the images in R, and after masking the clouds, I ...
9
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1answer
4k views

Is re-projection needed from SRID 4326 (WGS 84) to 4269 (NAD 83)SRID

I have US census data against state boundaries stored as SRID 4269, in an MSSQL DB. The input data used for calculations against that dataset is stored as SRID 4326. As far as I can infer from the ...
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1answer
233 views

Which Custom Geographic Transformation Method to use for Nad83 to Nad 83 (CSRS)

I couldn't find a NTv2 file for transforming GCS NAD83 to GCS NAD83(CSRS) so I'm trying to create a custom transformation using the 'Create Custom Geographic Transformation' tool in ArcMap. The tool ...
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0answers
642 views

ATS77 MTM 5 to NAD83 CSRS UTM 20N Coordinate Converter?

I've been looking for a simple way to check the accuracy of my transformation using a set of coordinates for a single point but have been unable to find an online tool or piece of desktop software ...
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0answers
69 views

How to best import a US Map Schematic?

I would like to use the following wiki US Map schematic as a background to my map work. (http://en.wikipedia.org/wiki/File:Blank_US_Map.svg) It is a .svg file, and GeoReferencer is unable to import it....
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1answer
634 views

Convert 2D coordinates from NAD83 to WGS84 using Postgis

I have a set of NAD83 coordinates that I need to convert to WGS84 coordinates. I am using postgis on an RDS. Specs for the box I am using from postgis_full_version(): POSTGIS="2.1.3 r12547" GEOS="3.4....
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0answers
49 views

Projecting NAD83 on-the-fly to WGS84 [duplicate]

I have a point feature class in a geodatabase that uses WGS84 as its SRS. A colleage of mine created points in this feature class using an external database containing lat and long values. However, ...
3
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1answer
309 views

Export DXF Issue in QGIS?

I got the shapefiles in QGIS and transformed them to UTM NAD83 from WGS84, then tried to create a DXF of it so I could use it as an overlay in fieldgenius software for a topographic survey we're ...
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2answers
16k views

Converting between wgs84 and nad83

This is a newbie question that is about converting between wgs84 and nad83. I have aerial photos that I am trying to compute lat long coordinates for as closely as possible. There are several factors ...
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1answer
202 views

ArcGIS 10.2.2 Does “Batch Project” work for different input datum?

I have two vector data sets - one is in NAD27 and the other is in WGS84. Normally I reproject one at a time. But can I just use 'batch project' to reproject both of them to NAD83 at once? I was not ...
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1answer
1k views

Proper transformation file to go from NAD83 CSRS UTM 17 to NAD83 UTM 17

Looking to determine which transformation file to select when using the Project tool in ArcMap 10.2.2 to go from NAD83 CSRS UTM 17 and NAD 83 UTM 17. The data I am working with is from Geogratis and ...
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2answers
4k views

ArcGIS Desktop:Transformations: Geographic vs Projected?

Arc10. I have two data sets (both CSV files w/ lat and long columns) and I am working on standardizing them to the same projection. File1: NAD27; File2: NAD27, WGS84, and NAD83. I would like all of ...
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1answer
431 views

NAD27 to NAD83, saving AFTER transformation?

I need to measure the distance (with the ruler) of points from two different layers. One layer is NAD83 and the other is NAD27. When importing the NAD27 csv file, I specified it was NAD27. Then I used:...
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1answer
107 views

Converting datum?

I need to measure the distance (with the ruler) of points from two different layers. However, one layer is NAD83 and the other is NAD27. I also have a standard ESRI basemap downloaded. The issue I ...
3
votes
1answer
158 views

Plotting NAD83 zone 8 points atop OSM or Fusion Tables

A geologist has given me a bunch of points to plot on a map I'm doing in WGS84. Her points are in NAD83, and she says they're in "zone 8." Here is one of the points. 440244 7599457 She says the ...
2
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1answer
598 views

Shifting a CAD file from ATS77 MTM 5 to NAD83 CSRS UTM 20

Looking to make the coordinate system shift in ArcMAP (for Nova Scotia) between ATS77 MTM 5 and NAD83 CSRS...NTv2 file?
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votes
2answers
1k views

Geographic Transformations in Alaska Between NAD83 and WGS84

I have done a ton of research on the most accurate transformation to use in mainland Alaska to convert between the NAD83 and WGS84 datums, but I just can't seem to find a definitive answer. ArcMap ...
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1answer
342 views

Aligning two layers captured in different coordinate systems

I have two layers, one of points (locations of fruit trees) and one of Atlanta zip codes, in an ArcMap, but the layers are not aligning. The zip codes are in the top right and the fruit points are ...
2
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1answer
181 views

Aligning layers with questionable metadata in SW Ontario

After making my best efforts to read/try everything I can on this forum and elsewhere, I unfortunately have to contribute to the wide literature of "my layers aren't aligning" questions. I am working ...