129 questions
0
votes
0
answers
53
views
Have problem in transform from EPSG:3857 to EPSG:3395
I'm using maplibre-gl map engine. I can't get the right tile when switching from EPSG:3857 to EPSG:3395. It looks like the only difference is the y value.
const transformCoord = function (_, z, x, y) {...
- 46
2
votes
1
answer
108
views
OpenLayers issue with Proj4
I was using OpenLayers 10.5.0 with Proj4 2.19.5 in a Vue3/Typescript project and this morning I upgraded those version to OL 10.6.1 and Proj4 2.19.7. Now I'm facing this typing issue:
error TS2345: ...
- 314
0
votes
0
answers
43
views
Reprojecting Raster Tiles in BNG format on React Native Maps?
I am using template URL to display tiles from a third party API. That API for tile serves the tiles in 27700 format. React Native Maps Template URL expects it in 3857 or similar web mercator formats.
...
- 35
0
votes
2
answers
223
views
proj4js converts EPSG 3946 into EPSG 4326, but the points are not located well
I have a .json file of points to put on a Leaflet map, and I have used the proj4js to convert them from the EPSG 3946 projection into the WGS84 EPSG 4326 one. All worked, but the points are not ...
0
votes
1
answer
80
views
Highcharts / highmaps GeoJSON map appears distorted and squashed
I have created a simple chloropleth of UK regions in highcharts, inclusive of countries other than England (North East, Wales, West Midlands, etc.) and I am using this public domain GeoJSON map.
I am ...
- 5
1
vote
0
answers
195
views
How do I restructure React-Leaflet from javascript using a EPSG:27700 Ordnance Survey map?
Would appreciate some help in understanding and restructuring a working javascript leaflet map into react-leaflet. I have a working javascript leaflet script that shows an OS EPSG:27700 map using the ...
- 11
0
votes
0
answers
257
views
How to create crs for leaflet using pro4js
I am a newbie to leaflet, and need an crs function sample to create an system that
can change the coordinate system from EPSG:3857 to EPSG:3826.
The basic library for coordinate I hope to use is ...
- 469
1
vote
0
answers
104
views
what is the usage of transform in source code of proj4leaflet.js
I am a newbie to leaflet.js, and recently, I need to create a CRS in leaflet for coordinate
system change. The transformation library I used is proj4leaflet.js. And the problem is when
I read the ...
- 469
0
votes
0
answers
57
views
I am getting incorrect north and east values after carthographic projection using PROJ library in c++
I am getting incorrect north and east values after carthographic projection from global wgs84 crs(i.e., EPSG:4326) to crs Korean 1985/west belt using proj c++ library. I got an error of approx. 1.5 cm ...
0
votes
1
answer
666
views
How to use the provided "PROJ4 string" while using "Cartopy" in python?
I have sea ice concentration values, x and y in meters (3 vectors with the same dimension) and I have the PROJ4 string: "Northern Hemisphere: +proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 +k=1 +x_0=...
- 11
2
votes
1
answer
629
views
How can I convert a point in EPSG:25832 to display it in Leaflet?
Say I have the following point in EPSG:25832:
[799325.792813, 5828257.530253]
I am having trouble displaying it on a leaflet map.
Using proj4, I was able to convert it to EPSG:3857
import proj4 from '...
1
vote
0
answers
984
views
Error: PROJ: proj_create: unrecognized format / unknown name
I have installed Terria JS and Cartoview. when i upload layers in Cartoview then they are uploaded but the following errors come:
Error Message: PROJ: proj_create_from_database: SQLite error on ...
0
votes
1
answer
580
views
Changing the Projection of the geoTiff to WGS84 in javascript/node.js
I am working in a react.js project where I am having a geoTiff file of projection "EPSG: 24378" and I want to show it in the leaflet map. I am using "georaster" and "georaster-...
- 11
1
vote
1
answer
276
views
Transforming point from EPSG:3844 to EPSG:3857
I'm having an issue transforming a point from EPSG:3844 to EPSG:3857 using Proj4JS. The transformation it performs seems off compared to the result given by PostGIS, pyproj, rgeo-proj4 or even epsg.io....
- 131
1
vote
0
answers
143
views
Microscope Images with overlays in OpenLayers
I am trying to build an viewer based on OpenLayers to view microscope images with overlays.
The images are > 50000 px x 50000 px and show a region of ~ 100 mm x 100 mm. In addition to the images, I ...
- 11
0
votes
1
answer
1k
views
Transforming coordinates from EPSG:3857 to EPSG:32633 using Proj4js
I'm trying to transform coordinates from EPSG:3857 to EPSG:32633 using Proj4js. I added this script and the code is as follows:
<script src="https://cdnjs.cloudflare.com/ajax/libs/...
0
votes
2
answers
894
views
Convert coordinates to corresponding place in table
I have a table with data of an area from west europe. I want to convert coordinates to a value in this table. The problem is similar to this question, but I'm not sure how to work this out as I've ...
- 1,456
3
votes
4
answers
3k
views
Not able to import proj4 in angular project
When I am trying to import proj4 in my angular project I am getting an error
Error: export 'defs' (imported as 'proj4') was not found in 'proj4' (possible exports: default)
I am importing as
import ...
- 609
2
votes
0
answers
651
views
Error in sp::CRS(SRS_string = "EPSG:24547") : NA
I am encountering an issue related to assigning CRS in sp package
If I run:
sp::CRS(SRS_string='EPSG:4326')
sp::CRS("+init=epsg:4326")
I get respectively those two errors:
Error in sp::...
- 421
0
votes
1
answer
1k
views
Openlayers - Turf.js Get distance between two Points using EPSG:3857
I want to show the user the distance from the last drawn point to the cursor. In order to do so I need to add a change listener to the geometry of the feature.
Every time the user moves the mouse this ...
- 1,213
1
vote
1
answer
2k
views
Is there a way in OpenLayers to render EPSG:3857 tiles on an EPSG:4326 map?
I have a map in the EPSG:4326 projection, and I'd like to use an EPSG:3857 tileset such as the one from Mapbox. However, I've so far not been able to make it work.
In this discussion ahocevar explains ...
- 15.8k
0
votes
1
answer
316
views
Highcharts Map bubble on Pacific Centered World map
We have a requirement of map bubble on a pacific centered world map. We have achieved the part of pacific centered world map using the https://www.highcharts.com/forum/viewtopic.php?t=36545 but when ...
0
votes
1
answer
1k
views
Proj4js - convert WGS84 to UTM (military grid reference system)
Very new to the proj4js library and most things geo-spacial related, so getting my head around all the naming conventions and different types of coordinate systems.
Essentially I'm trying to take a ...
- 4,229
1
vote
0
answers
138
views
Is setView impacted by CRS change?
I'm using the French IGN Leaflet extension (which use Proj4Leaflet internally) to display maps with a different coordinates system (Lambert 93 and not WGS 84). I would like to know if there is a way ...
- 95
1
vote
1
answer
3k
views
How to convert WGS84 coordinate to UTM?
How can I convert geo coordinates from WGS 84 to UTM using JavaScript?
I tried using proj4js, but it yields these coordinates: 32U 5114272 1633427, whereas external sources tell us, that 32U 688260 ...
- 21.8k
0
votes
1
answer
342
views
Google app scripts proj4js library integration [duplicate]
Good people of stackoverflow.
I would like to write a custom function in google sheets for coordinate transformation. The function shuld transform coordinates in Slovene natioanl grid (EPSG: 3912) to ...
- 13
0
votes
1
answer
1k
views
Converting from WGS84 to EPSG:27700 raster tiles without drawing a map
Using this example from OS Data Hub - https://labs.os.uk/public/os-data-hub-examples/os-maps-api/zxy-27700-basic-map
I can get a list of tiles displayed on the map, I would like to get the coordinates ...
- 181
0
votes
1
answer
738
views
Openlayers - transform polygon from a specific projection like EPSG:28992
How can I add a simple polygon with a specific projection to my map?
The polygon is valid, I checked before.
coordinatesPolygonInRd = [ [ [173563, 441818], [173063, 441818], [173063, 444318],
[...
- 7,723
0
votes
0
answers
212
views
Proj4Leaflet converting coordinates of map center
Please help me, why this is not working:
console.log(proj4('EPSG:2180', [map.getCenter()]));
while this is working fine:
console.log(proj4('EPSG:2180', [21,52]));
Console shows [NaN, NaN]...
What ...
- 1
3
votes
1
answer
1k
views
Vertical alignment of TMS tiles in Leaflet using EPSG:25832 projection
I am using Leaflet with Proj4Leaflet to work with tiles in 25832. The application is fairly simple: I am trying to overlay tiles in EPSG:25832 onto a omniscale basemap. I have copied the individual ...
- 1,392
0
votes
0
answers
292
views
Highchart map not loaded - Angular & proj4
I'm trying to load a map chart using highchart but the map won't display. The map seems to be properly loaded.
I'm using Angular and it's officiel highchart wrapper. Also proj4 is needed to have lat &...
- 91
0
votes
1
answer
961
views
Using a specific nadgrid with Openlayers 6 / Proj4js
I have an issue with reprojecting vector data from one coordinate system to another by using proj4js.
The data source uses a Gauss Kruger 2 Projection (EPSG: 31466) and I want to convert it to EPSG:...
- 48
0
votes
1
answer
632
views
proj4 convert world coordinates to custom local frame aka how to set proj.def()
here is a world coordinate for the center of river north, chicago 41.892571, -87.630712
and here is where i want my coordinate system to be based from 41.881984 -87.629437 (south of river north in the ...
- 3,476
0
votes
1
answer
7k
views
Leaflet : TypeError: coordinates must be finite numbers
I'm trying to use Leaflet with a specific projection EPSG:2169 (Luref, or Luxembourg).
I saw that if I don't use a "standard" projection like WGS84, I have to use Proj4Leaflet and reference it to the ...
- 109
0
votes
1
answer
767
views
Reprojection issue while trying to recode an OpenLayers function
Because of conflicts between some libraries (prototype.js and pro4js) i need to rewrite a function of OpenLayers. But even when i try to use the exact same code than on their github, the result ...
- 768
3
votes
1
answer
2k
views
I can't transform geometries to a projection defined in proj4.defs in openlayers 5.3
I have a Node mapping application that uses openlayers V5.3.0. When I try to transform geometries from EPSG:4326 to a projection defined using proj4.defs I get this error message:
TypeError: Cannot ...
- 157
0
votes
1
answer
1k
views
Bundling proj4js with webpack leads to "Unexpected token m in JSON at position 0"
I try to include proj4js (2.5.0) as an ES6 module in a webpack (4.27.1) project.
import proj4 from 'proj4';
That leads to this error:
ERROR in ./node_modules/proj4/package.json
Module parse failed: ...
- 148
-1
votes
1
answer
389
views
How to figure out resolution array from user inputted ArcGIS projection data
I have a Leaflet based mapping solution that uses ArcGIS map configuration supplied by a user (I have no idea what it will be, they will customize it with their own ArcGIS services). The issue is that ...
- 11
1
vote
0
answers
411
views
Trouble performing projection-transformation of coordinates, for use in Leaflet
I am able to load a leaflet map and add figures: https://jsfiddle.net/user3493503/sdLtvrew/
I like to use another baselayer, and am able to do it with a key. https://jsfiddle.net/user3493503/s9fyxem4/...
- 55
0
votes
1
answer
735
views
proj4.js how can I convert UTM to EOV coordinate?
I using javascript for converting UTM to WSG84 lon lat with the following code where the utm_zone contains the UTM zone number.
var utm = "+proj=utm +zone=";
utm = utm + "" + utm_zone;
var wgs84 = "+...
- 1,752
0
votes
0
answers
228
views
Leaflet: Fractional and irregular zoom levels from own tiles {z}
I'm using my own tile images to display in Leaflet. I know that it's possible to use fractional zoom levels, e. g. {1, 1.25, 1.5} so that Leaflet automatically enlarges the tiles according to the ...
- 269
5
votes
2
answers
2k
views
angular & migration openlayers to ol & proj4js
Tried to migrate an angular-based project using openlayers away from deprecated openlayers-npm-package to recommended ol-npm-package. By debugging i realized that i had a problem with the previously ...
- 131
0
votes
1
answer
4k
views
Proj4JS - Transformation 2.3.3 vs 2.4.3
Why in the heck in Proj4JS that 2.4.3 with the same code transforms coordinates completely different? See this fiddle.
If you Swap the order of the proj4js resources on the left. You will see that 2....
- 149
0
votes
0
answers
1k
views
How to get the hc-transform for a custom map?
I have a GeoJson from brazil which is a more detailed version of the official HighMaps Brazil map. In this JSON I have the states divided into its mesoregions.
When I tried to draw a point on top of ...
- 3,235
4
votes
1
answer
4k
views
How to import Proj4js to use with Highmaps?
I have a Vue application that is using highchart with the vue-highcart component to plot maps.
I need to plot points on this maps based on the Latitude and Longitude and, according to Highmaps ...
- 3,235
2
votes
1
answer
4k
views
Proj4Leaflet transform from 4326 to 3857 in Leaflet
I am working on Leaflet from last week and this issue is killing me.
The database returns coordinates to create a Leaflet marker (working with default Map.CRS EPSG3857), so I decide to transform the ...
- 446
1
vote
1
answer
7k
views
trying to use EPSG:3857 in Leaflet
I am trying to make leaflet use EPSG:3857 as an input coordinate system. I use porj4leaflet to achieve this. I have defined my map instance like this:
var map = L.map('map', {
center: [8378860.13, ...
- 1,364
1
vote
1
answer
555
views
How can I resolve this Leaflet error? getPixelWorldBounds()
Does anyone know what could be causing the following error when trying to create a leaflet map? It has something to do with the custom CRS. I can't post much of the code for various reasons so if ...
- 1,507
0
votes
1
answer
361
views
Why I can't get correct value when used proj4js's method transform() (wgs84 -> utm-k)
I want to get correct value transform in proj4js.
coordinate converted value wgs84 (EPSG:4326) -> utm-k (EPSG:5179)
I tried to get coordinate converted value but i couldn't get correct value.
But ...
- 75
0
votes
1
answer
1k
views
Openlayers 4 map is blurry when specifying tilegrid
I am upgrading from OL2 to OL4.
The OL2 version is running at vegkart.no.
I have run into a problem where the map gets blurry when tileGrid is specified. Without tileGrid the map looks clear, but ...
- 105