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Questions tagged [coordinate-system]

A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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How to convert a raster file to .asc without losing spatial reference in ArcMap10.5

I am trying to convert several raster files (some with continuous and some with categorical data) into .asc files. I have used the "Raster to ASCII" tool, but when I click on properties of the newly ...
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34 views

Why did not I manage to reproject layer?

I have a global land cover map, which has the following properties: Name ESACCI-LC-L4-LCCS-Map-300m-P5Y-2010-v1.6.1 Path C:\QGIS\ESACCI-LC-L4-LCCS-Map-300m-P5Y-2010-v1.6.1.tif\ESACCI-LC-L4-LCCS-...
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How to share custom coordinate in an atlas between pages? [on hold]

I know we can build custom coordinate grid (cf. url:How to create a custom coordinate grid in the QGIS 2.14.2?). I would like to use this in an atlas but I have not succeded yet. I get Page 1 : ...
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List of lat-long, need values in a raster

Apologies in advance as I am not a GIS specialist by any means. I have a set of 1 million points and I'm trying to find their values in a geotiff raster. I've tried various versions of this answer ...
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Converting unknown coordinate (EPSG:3395?) to EPSG:3857

I'm attempting to convert a 7-digit coordinate of an unknown coordinate system I receive in this format: { lat: 4575651.267366762, lng: -9729851.06598594 } After a few hours of trial and error, I ...
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33 views

How can I calculate degree of distortion on an Azimuthal Equidistant projection?

The Tissot's indicatrix of an Azimuthal Equidistant projection shows ellipses being stretched along latitudes. How can I calculate the degree (amount) of this distortion? That is, what is the ratio ...
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35 views

Reprojecting a GDB in arcpy

I am trying to convert the feature classes in data.gdb to a new PCS per the code on this webpage: import arcpy import os arcpy.env.workspace = "G:/W135thStCopy/data.gdb" arcpy.env.overwriteOutput = ...
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Show coordinate in OpenLayers 2?

I want to show coordinate of every point in OSM. I am using OpenLayers 2. The below code is not working and does not show any error in the console. What is wrong with that code? var popup = Ext....
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20 views

Error in points or military academy dataset?

I travel regularly to sites around Vietnam reported in declassified Australian military documents. All grid coordinates are reported in abbreviated MGRS and are usually quite accurate. In recent ...
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28 views

Choosing between several very similar projections

When working with data from different sources, they often come in with different EPSG codes, even when they are using the same nominal projection. For example, I often work in Washington State Plane ...
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Measuring area using correct CRS and units in QGIS

I have uploaded a shapefile and I am simply trying to calculate some simple areas of provinces (and I know their areas from Wikipedia). My map is from Zimbabwe, and I have saved the project, ...
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Aerial imagery not projecting on the fly in Noosa

Before installing Noosa, I used to add shapefile vector layers with a County Coordinate system PRJ file, then add an aerial image from either a local server or ArcGIS online, and the image would ...
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Changing CRS of geometry in geopandas dataframe efficiently?

I have a shapefile which I am converting into a geopandas dataframe. The CRS of this shapefile is epsg:4326 and I want to convert this to epsg:3857. import geopandas as gp file_path = 'zip_poly.shp' ...
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28 views

Changing CRS in GeoPandas?

I'm trying to plot a bunch of points on a map of Britain and Ireland, and I've been using GeoPandas for that. I've basically just been following the tutorials to do that, and slicing a world map with ...
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How to reproject a raster based on another raster when the datum is not said and get the same extent?

I am working with two rasters. I am trying to reproject r1 the same way as the raster r2. Rasters are available here r1 class : RasterLayer dimensions : 30286, 58025, 1757345150 (nrow, ncol,...
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56 views

Travel Distance Calculation in QGIS

What is the best method calculating travel distance between destination and point layer in QGIS when using OSGB 1936 / British National Grid coordinate reference system?
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51 views

Same equal area projection results in different areas when shifting the center of projection

I found that using an equal area projection results in different areas for the same polygons if you shift the center of projection (ie to minimize the distortion of your area of interest when you ...
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1answer
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Open .tiff, set projection, then re-save in Python with GDAL

I am trying to set the projections of a .tiff file from another file with GDAL in Python. I successfully set the projections, but how do I re-save the .tiff afterwards? Here is my code: ds = gdal....
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21 views

NADCON 5.0 Transformations in ArcGIS

Are the new(ish) NADCON 5.0 transformations available in ArcGIS? If so, at what versions? If not, can they be added? Specifically, I am looking to go from NAD83(2011) to NAD27. I am ...
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1answer
47 views

Grid is not showing exact Lat-Lon of the map image in QGIS Printcomposer?

I am trying to print a map using QGIS 3.6. My study area is situated within 23.55’42”N 89.27’43”E to 23.55’47”N 89.95’01”E. I am using a Landsat image as map image, The map projection is EPSG 32645 (...
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Non-Earth System in QGIS?

What I need is a function for Non Earth Coordinates in QGIS (both projects and layers). They should be mappable to any projected coordinate system (like SWEREF99TM). Why: In the Mining industry we ...
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2answers
39 views

Fiona and Geopandas not applying CRS to shapefile during creation

I'm trying to create a shapefile of points from a coordinate list. But, when I use fiona to create the shapefile Arc Catalog is showing that there is no CRS. I tried to add the CRS with Geopandas and ...
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Google Labelled Places (Pins) into KMZ or Shapefile

I hope this isn't a redundant question as I tried searching and trying several things to fix my problem, but here it is: My coworker dropped a bunch of pins in Google Maps, hoping that I could get ...
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Coordinate system changes after convertion from feature to raster?

For an hydrologic model I'm supposed to add a DEM as a .tiff data and another raster as .tiff data for roughness. So I exported my DEM as a .tiff without any problems. I have the roughness Information ...
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49 views

Displaying XY coordinates CSV file but not showing correct location on basemap of ArcMap?

I uploaded a CSV file to ArcMap with longitude and latitude value. The values were obtained from Google Maps and verified in Google Earth. I used display XY with X(longitude) and Y(latitude) and I ...
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23 views

Transforming NetCDF file in longlat projection into TIF in EASE 2.0 using gdal_translate and gdalwarp

I am very new in this. My goal is to convert 1 subband from .nc files (which I have several thousand if it matters) stored in longlat projection into .tif files in EASE 2.0 projection. I do that in 2 ...
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1answer
24 views

Mapbox GL JS ImageSource wrong coordinates

I'm struggling to position an image correctly onto my map. I'm using one of the following URLs for my (live) image: https://maps.dwd.de/geoserver/dwd/wms?service=WMS&version=1.3.0&request=...
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25 views

Using st_read to create an owin in R

I have updated a program because readShapePoly has been replaced by st_read. Changing from: unzip(paste(mdir, "AU_Vic_POA_2011.zip", sep = "")) boundary.shp <- readShapePoly("...
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44 views

Scaling WGS84 coordinates?

I know this is a weird question, but I would like to know if it is possible to construct a proj4 string so that I can use proj4 to convert from WGS84 to a "scaled" WGS84 system. For example with a ...
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1answer
53 views

Getting Canada shapefile to overlay model on QGIS?

How can I get Canada to overlap with the rest of my map? I think this is a CRS problem but I really do not know how to solve it.
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Degrees Minutes delimited Seconds conversion

How do you handle delimited seconds? I can find a bunch of stuff on converting degrees minutes seconds. That is easy enough. My question is what about when there is a 4th set of numbers for example, ...
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25 views

Shapefile created from Whitebox GAT has no *. prj file?

I am new to Whitebox GAT. I found out that the shapefile I created in it does not have projection file. Did I do something wrong?
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Shapefiles not lining up - defined projection and re-projected [duplicate]

I have shapefiles created from GPS coordinates from three different regions within a province in Canada. The raw data coordinate systems seem to me to match and when displaying xy coordinates from the ...
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1answer
75 views

GeoTools CRS transformation for EPSG:5514 to WGS84 does not work

I am using GeoTools to transform geometries from Krovak projection (EPSG:5514) to WGS84. I am following GeoTools library documentation - http://docs.geotools.org/stable/userguide/library/referencing/...
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On the fly projection of raster images no longer works in QGIS 3.6.1

For years I have created QGIS projects from Shapefiles using ESRI County Coordinate prj files. I have always been able to add aerial imagery from an ESRI ARCGIS Online server or local server and the ...
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14 views

CRS problem after raster reproject via QGIS Warp

I have a land cover raster downloaded from NLCD website with CRS as **EPSG: 42303** - NAD 83/Albers NorthAM. I reprojected it to **EPSG: 102740**, Texas State Plane South Central Zone 4204 via Warp of ...
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93 views

Difference between SnakeGrid and latitude and longitude

I am not a geography subject expert and maybe my this comparison make no sense as i don't have enough knowledge (one of the reason to ask this question here). I have a project where I am doing ...
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Whats your favorite map projection for [closed]

What is your a nice projection for the southern Atlantic? S.America & W. Africa? I'm looking to produce nice maps with little distortion on shapes. Leaning toward Lambert.
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42 views

Project raster with geographic transformation works stand alone but not in model with iteration

I will briefly describe my unsuccessful model shown below. It fails at the very last Project Raster step, where I receive an error mesage. The model: I have a workspace called South America. It ...
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26 views

Oblique Mercator Distorts Edges of Map

I'm learning how to use Oblique Mercator projection in QGIS 3.4.7. I created a custom projection with "omerc" and passed two points (New York City, USA and Tokyo, Japan) as the parameter. Extent: ...
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29 views

QGIS Multi distance buffer units do not align with the main layer

I have a buildings shapefile of Beijing. I know the projection WGS_1984_UTM_Zone_50N WKID: 32650 Authority: EPSG So I would like to create multi distance buffer from a central point but when I do so, ...
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1answer
33 views

Converting X and Y coordinates from Mercator world map (square) image to Latitude and Longitude

I'm using the following JS to transform Latitude and Longitude to X and Y coordinates but now I need the contrary, transforming Latitude and Longitude to X and Y. export const latLon2xy = (lat, lon, ...
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57 views

Any conversion calculations for WGS84 to EPSG:27700?

I'm trying to get some OSM data to overlay correctly over Lidar data. The OSM data according to their wiki is WGS84. The lidar is [EPSG:27700][1]. So as you can imagine they don't line up/overlay ...
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2answers
63 views

OpenRailway Map basemap in QGIS

I'm a bit of a QGIS noob when it comes to anything other than the basics so hoping someone has an easy solution to this. I am trying to use Open Railway Maps ( https://www.openrailwaymap.org/ ) as a ...
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Fixed distance buffer is oval in QGIS?

I want to create circles of diameter 20m in QGIS. I create a point and then use vector - geoprocessing tools - fixed distance buffer. My problem is that the size is crazy and worse, the shape is not a ...
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1answer
47 views

Reprojection doesn't change the coordinates

Following the StackOverflow guidance, I have reprojected raster layers into WGS84/UTM 36N using the Raster-> Warp -> Reproject tool. According to the Raster Properties, all the rasters are now in the ...
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2answers
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Plotting lon/lat point (without manual conversion) on XY map using GeoPandas?

I am data scientist not experienced in GIS and need to do some simple map plotting of the Netherlands. Using Geopandas everything works out nice and dandy for my purposes however I am stuck on 1 ...
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50 views

Intentionally offset GPS coordinates using heading [closed]

Is there a known way of intentionally offsetting a latitude/longitude position by using a combination of the latitude/longitude and heading? I'm struggling to find any kind of answer or solution for ...
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1answer
54 views

Changing local coordinate system to WGS84 in QGIS print composer?

I have composed a map where shapefiles, points etc. all are in local coordinate system (l-est). Is it possible to convert it to common WGS84 system? So that in printed map there are coordinates 23....
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Coordinate System shows up incorrect after converting a shapely object to a shapefile [duplicate]

I am trying to convert a simple point object created using shapely to a shapefile using fiona as instructed in this post. I pretty much followed line by line except that I changed the crs as I need it ...