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. This tag also refers to cartographic projections and coordinate system transformations.
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Editing dynamic text in ArcGIS Pro to get 100k Grid zone labels?
While making maps with MGRS I need to have a label in each corner of the map frame with the 100k grid square labels.
So far i have updated them manually, but after i've started using ArcGIS Pro i ...
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Pros/Cons of using 'ellipsoidal' for calculating geometry in QGIS?
When I have found geometry attributes in the past, I've found my distances are often out by quite a lot unless I use an ellipsoidal CRS to calculate them. Why is this the case?
Should I be using ...
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Reprojecting ECW raster in FME gives black border?
Using FME i want to reproject an ECW image to EPSG:3857 from EPSG:28354.
I intend to sit this image(and many more) over a large mosiac.
Using CSMapReprojector this re-projects with a boarder. I've ...
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Lambert-Conic projection - GPS of corners
I have an 2D image in Lambert-Conic projection. I know the bounding box of coordinates, but I want to calculate the coordinates of image corners. They don't have to be the same as bounding box. How ...
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QGIS changes CRS for new layers using GRASS toolbox functions. Is that normal?
I noticed that QGIS changes the CRS of newly generated layers, that is, I have a layer in my desired CRS, then I use a toolbox function with that layer as input, and the resulting layer is often in a ...
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Invalid WKT polygon error
We are trying to load the data in Solr through CSV file. The data is in the below format.
WKT(Its one column)
POLYGON ((44225.300000005 61616.3199999181 0.0, 43615.3000000049 61616.3199999181 0.0, ...
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Move polygon to new location (find new lat-lng coordinates)
I need to move my polygon (region of geographical area) with 4 different (O1, O2, O3 and O4) lat-lng coordinates (as shown in the figure) to another place, so that I get new values of all 4 lat-lng ...
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Measuring wrong, EPSG:27700 in QGIS3.6
If "enable on the fly" is on and the CRS changes at all during the lifetime of a project then seemingly, it refuses to measure (using the measure tool I just get 0.00000). So new project with all the ...
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QGIS CRS for small island based on transformation with large rotations and tm-projection
I am trying to create a CRS for QGIS based on a GPSsurvey and the related transformation and rotation parameters. Within OSGEO I defined a transformation and projection as follows:
cct +proj=pipeline ...
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216
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Changing Map Coordinate System Changes in ArcGIS Pro Changes Azimuth
I am trying to create a label that will overlay a line in ArcGIS Pro, the layer is coming from a PostGIS database. The underlying materialized view for the label/symbol overlay is something like this: ...
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Is the Albers Equal Area projection only useful for calculating the area over small differences in longitude?
I've been trying to calculate the area of a map, given its WGS 84 coordinates, with the following code:
import pyproj
import shapely
import shapely.ops as ops
from shapely.geometry.polygon import ...
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SQL server 2012 convert Multipolygon geometry to geography - GDA94 / MGA zone 55 coordinate reference system
Is there a way to convert geometry column value which has GDA94 / MGA zone 55 coordinate reference system into Geography value in SQL server 2012.
The layer is a multipolygon layer
We were having the ...
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Adding distance when buffering point geometry in a geodataframe?
I have 2 geodataframes that I want to combine. They the same fields/columns but different geometries (one is points, one is polygons).To do this I want to buffer the points slightly (like 10m or ...
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Converting from EPSG 25833 to WGS 4326 using QGIS? [duplicate]
I have a layer of Brandenburg (Germany) in EPSG 25833 which I want to tranfrom to EPSG 4326. Similar to this answer to Transforming shapefile to WGS:84 (EPSG: 4326) in QGIS?, I set the CRS to EPSG ...
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Using local tangent plane projection in QGIS?
Is local tangent plane projection is a kind of gnomonic projection?
is it possible to define it as a custom projection in QGis?
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Importing an image to QGIS with no coordinates, only a scale of the drawing
Is it possible to import a drawining into QGIS without having any coordinates or CRS. The scale that I have is 1:1250.
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Reproject multiple vector layers in QGIS [closed]
How can I reproject multiple vector layers in QGIS? I have a thousand layers (around 100 in each folder) without projection info. All need to be set in WGS84.
I know about the batch Processing tool ...
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Large offset between two identical vector layers
I want to have a dxf layer to overlay another layer. The dxf layer is already saved to a shapefile with the needed crs. The layer has a large offset and nothing happens when I set the crs to the ...
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World Mercator Projection with Chucotka region in right part? [duplicate]
How can I choose or modify World Mercator projection to display eastern part of Chucotka region in the right part of the map? I have already tried to change the parametr +lon_0, but the map looks like ...
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How do I convert IGb08 coordinates into an ECEF frame?
I'm relatively new at GPS positioning, and have come across precise orbital calculation files here. I've parsed the sp3 files and gotten the values into something I can work with, but I don't know ...
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Why is there a difference in length for two lines created from the same points, one with ArcGIS Pro and the other with Geopandas? [closed]
Update
Question off-topic because I launched the ArcGIS treatment again and for an unknown reason this time I obtained the 21.56km length I was expecting.
It means the error comes from either my ...
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Reproject tool working in QGIS?
I am using QGIS 3.4.8.
I'm working on a project and the projection is in EPSG:2772-NAD83(HARN)/Colorado North and the Ellipsoid is GRS 1980(IUGG,1980). I received a some new shapefiles for the ...
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Calculating latitude and longitude fields using PostGIS? [duplicate]
I have a shape in PostGIS that has 2,658,061 records (points).
I need to create a field that is called "Latitude" and another that is called "longitude" and calculate a position in WGS84 (SRID: 4326)...
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150
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QGIS 3.6 QUICKOSM buildings query CRS with metre untis to create buffer
Using QGIS 3.6.2
I'm running a QUICKOSM query to find residential buildings in Scotland. I want to then put a buffer around them. The query is fine, if a little slow. The only CRS I can get to ...
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39
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Point shapefile not showing up when adding layer in QGIS?
The layer has all the points in the attribute table and when I click "Zoom to Layer" it zooms to the location where the points should be, but no points are appearing.
I also have a tried uploading ...
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209
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Georeferencing Data Points?
I am looking for a coordinate system of New Zealand. I just have x/y coordinates of the south island, but no further information on the map. I have tried several systems and nothing did fit the data ...
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241
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Similarity between two sets of lat/long points
I am trying to measure the similarity between two trajectories (two sets of lat/long points) which are the outputs from two APIs. I am trying to measure the difference between the routes given by ...
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161
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Issue displaying UTM coordinates in QGIS 3.6.1
I am having trouble properly displaying my .shp layers in UTM (QGIS 3.6.1). Whatever I do, the coordinates always display as lat/ long, and measurements are way out. I have re-saved all my .shp layers ...
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How to convert Lat, Lon, Alt to ECEF and EPSG 4979?
I am programmatically generating data to use in Cesium's 3D Tile System. The data I have is in (Latitude, Longitude, Altitude) format. To display the data in Cesium, I have to first define a region to ...
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Difference in ONS area and area calculation in GIS-software
I have an official shapefile from the ONS (Office for National Statistics) in the BNG (British National Grid) projection.
It has an st_areaha attribute column - I understand this is the area in ...
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363
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Applying 3D-Helmert Transformation Parameters in QGIS?
I have received a set of local transformation parameters from my surveyor to go from WGS84/UTM36S to ARC1950/UTM36S (See picture below)
The way QGIS does the transformation is not the best. I am ...
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Shapefiles with same coordinate system do not match [duplicate]
I have a problem with ArcGIS. I'd like to project two layers in the same coordinate system (WGS84/Mercator; 3395) but these don't match.
I have one map with sovereign states borders, drawn from ...
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Transforming TM75(29903) squares to ETRS89(3035)?
A bit of a long winded explanation here so please bear with me. I have received grid square data in ETRS89(3035) which I need to cross reference with out own grid squares which are in TM75(29903). ...
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Why did QGIS 3.6 crash? [closed]
I have clipped a raster file using a shapefile as a mask.
And I tried to export the new layer and modified the projection from WGS 84 EPSG:4326 to EPSG: 102022 Africa Albers Equal Area Conic.
When ...
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Transform an azimuth measured in a given projection system to its value in a separate projection system
I have a set of polygons in which one of the attributes is azimuth. This azimuth was measured in ESPG:3310 (California Albers). I want to transform this measure to ESPG:4326 (WGS 84). I know the ...
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Why does QGIS save EPSG:4326 as long, lat? [duplicate]
Why does QGIS save EPSG:4326 with coordinates in the longitude, latitude format? Isn't the correct standardized format latitude, longitude?
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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? [closed]
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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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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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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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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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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How to calculate OSM WGS84 Lat and Lon to meters in C++?
Summary
I am converting OSM coordinates into X and Y values with accurate distances in meters between all points using c++. The calculations/code I am using is resulting in an incorrect ratio/scale ...
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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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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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Seeking C# code to convert Easting/Northing to latitude/longitude in GDA94 / MGA zone 56? [closed]
I am very new to GIS.
I'm pulling data from an ArcGIS Rest API service for a city in Australia to display as pins on a map in another system. The data I'm getting back has all the actual coordinates ...
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