A map projection is any method of representing the surface of a sphere or other three-dimensional body on a plane

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2
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1answer
13 views

OpenLayers 3 / Cesium polygon projection issue

I am using OpenLayers 3 and Cesium (via ol3-cesium). I have created a few rectangles (using a MultiPolygon) stacked on top of each other. Whereas in OpenLayers the rendering (left) is as expected, ...
-2
votes
0answers
13 views

not matching shapefiles

I have two shapefiles (see below) and they are not matching, I know that there is a problem with coordinate systems, but I tried so many things. 1. coordinates from google maps Geographic Coordinate ...
2
votes
0answers
35 views

Calculate Geometry function returns underestimated distances

I'm making a map of the Colorado Trail and obtained a set of waypoints taken down the entire trail. I projected the set of waypoints from WGS84 (unprojected) to NAD 83 UTM13N after adding to the data ...
3
votes
0answers
29 views

Rectangle shapefiles with the same extents does not align perfectly after projection

I have a rectangle shapefile built with UTM19 coordinates using a python script, and then projected to NAD83_CSRS (EPSG:4617). I have a second rectangle shapefile built with the same method (python ...
2
votes
0answers
28 views

Visualizing netCDF file with unknown projection

I'm having a tough time visualizing a netCDF file with poor metadata in ArcMap, which is probably not a surprise. I know the file to contain ozone concentrations over the United States. If I try to ...
1
vote
0answers
9 views

Openlayers Reprojection from 4326 to 3395 is wrong?

I'm using proj4js definitions downloaded directly from epsg.io webpage. When trying to reproject a small extent I get this result: ol.proj.transformExtent([-180, -90, -179, -89], 'EPSG:4326', ...
0
votes
0answers
19 views

Problems to export raster files in R software

I'm working with R software with raster and netcdf4 packages adn netcdf files to get information from SST. I got the information and now I'd like to convert in ascii or geotiff files to work in ArcMap ...
0
votes
1answer
24 views

Background color changes when projecting a raster with ArcGIS 10.4

I'm using the Project Raster tool via arcpy: arcpy.ProjectRaster_management( in_raster = clipped_raster, out_raster = projected_clipped_raster, out_coor_system = ...
3
votes
1answer
80 views

Change the actual coordinates in a shapefile (QGIS)

I'm trying to map data for a county in Texas. The data were provided to me in a shapefile, and I've been working with it in QGIS 2.14. My problem is this: The coordinates in the shapefile I was given ...
1
vote
0answers
21 views

Openlayers 3 connecting to a wms feed with a different projection

I am trying to incorporate a wms feed in the British national grid projection (EPSG:27700) into a openlayers 3 project. I initially had used this wms layer in an openlayers 2 application using the ...
3
votes
1answer
53 views

Coordinate points not lining up with a preexisting map on QGIS

I asked this question once before, but I did not receive any feedback on solving on the issue and I am still confused as to what I am doing wrong. I found a public domain map of Florida counties on ...
0
votes
1answer
21 views

How can i project a coordinate system for many rasters all at once? [duplicate]

help many rasters i have and should be projected in UTM coordinate system. what should i do?
3
votes
1answer
22 views

Strange Custom Projection can't be transformed

I've got a a database of feature classes that were somehow transformed into a custom projection that I don't understand, and there does not seem to be a way to get back out of. The projection data ...
5
votes
3answers
109 views

Are perpendicular lines still perpendicular after converting from UTM zone 15 to 16 (or between two neighboring zones)?

I want to convert a square polygon that is close to the edge of UTM zones 15N and 16N. The polygon's coordinates are in UTM 16N, but it is spatially positioned in the UTM15 area. My question is that ...
0
votes
0answers
15 views

GCS_Clarke_1880 transformation to GCS_WGS_1984 in ArcGIS 10.3.1

ArcGIS 10.3.1 has no transformation for GCS_Clarke_1880 to GCS_WGS_1984. Why is this the case, what have I missed? Do we have to write a custom transformation? There are a heap of Clarke ...
-1
votes
0answers
31 views

How to project SRTM DEM data?

I am trying to project a SRTM DEM file (raster format GRID) that covers my study region to a better projection and I hope with this I will figure out the cell size in meters. The DEM is currently in ...
2
votes
2answers
67 views

Lambert conformal conic projection

For a Lambert conformal conic projection, when projecting the cone on the globe, two parallels are formed and the scale decreases between the two parallels and increases outside them. Why this ...
2
votes
2answers
87 views

Is it possible to restore lost PRJ-Files?

Currently I am working on a project with QGIS (2.14.1). Therefore I need to add old (but important) shapes that were drawn by a colleague. Somehow most of the .prj-files are missing - I don't know ...
1
vote
0answers
19 views

PostGIS Svg Projection on Google Map

Context I have a database with spatial data such as areas and points. Some of the areas in my db are coming from OpenStreetMaps, representing some regions. (Which are kinda small at earth's scale, ...
0
votes
2answers
27 views

How to check my EPSG and units in R when it is not defined in proj4string?

After reading my .shp in R using readOGR(), I tried to figure out what is my EPSG and what are my units in my projections? when I tape my.shp = readOGR(dsn=setwd(dsn = dsn, ...
2
votes
0answers
26 views

Problems with matching vector data with raster data

I’m new in Arcgis, and I have some trouble in this task: I downloaded from ICC (www.icc.cat) a raster data map that is a in a specific coordinate system, if I right click to view its properties, it ...
1
vote
1answer
23 views

Why is my imported map showing up so small in ArcMap 10.2?

I have .asc files that contains a map of a predicted species distribution I got from using MaxEnt. When I import the file with the data frame properties set to North American Albers Equal Area the ...
0
votes
0answers
6 views

C# selecting map tiles from user defined rectangle points?

I have a WPF user control with which the user can draw a rectangle on the map canvas to define an area for downloading background imagery tiles from a web service. The tiles are in Lat long 1x1 ...
3
votes
0answers
37 views

GDAL c# API returned different WKT from gdalinfo

I've found completely different results in WKT strings while using gdalinfo utility and method from c# API GetProjectionRef(). In the first case the result was: PROJCS["WGS 84 / Pseudo-Mercator", ...
0
votes
0answers
10 views

How to avoid blurred projection after transformation of .tif files

For my Project I have a lot of shapefiles and .tif files with different projections. I aimed to store everything in a gdb and transform everything to the same coordinate System (ETRS1989 UTM 32N). The ...
2
votes
0answers
41 views

Converting from unknown coordinate system into common one using fiducial points?

I have a thousand of points that I want to project in a different coordinate system. These points were generated using an old and odd coordinate system (let's call it CS) so it's not possible to use ...
2
votes
2answers
34 views

Projections for a region spanning multiple UTM zones

I have a problem which is sort of similar to the one here: Dealing with data that spreads across UTM Zones? Essentially I am looking for a projection for this region: ...
1
vote
0answers
28 views

Is there any way to use Cesiumjs to import 3D Models using the British National Grid (OSGB36)?

I am trying to import a 3D model (.gltf) into Cesium which is in OSGB36 projection, however I know that Cesiumjs doesn't support British projection natively. I've tried changing the origin of the ...
2
votes
2answers
34 views

QGIS Merge rasters without projection edges

I have been trying with no luck to merge forest canopy rasters available through the NLCD (e.g. Grids 102 and 105) using QGIS in Mac (as well as R, and SAGA in Windows). The GeoTIFF grids import and ...
0
votes
0answers
21 views

Why don't latitude and longitude match with others one?

I have a latitude and longitude: 60.011887, 30.37898 When I add marker to openLayersMap I get this marker in another place. Why does this happen? here is the code: var MyMap = (function() { var ...
5
votes
2answers
87 views

Why am I getting two different outputs from Python and C++ using GDAL?

I am trying to gather information from a *.tif file using the GDAL libraries. When I open the *.tif file using both the Python API, and C++ API, I encouter two completely different answers. Here are ...
7
votes
3answers
259 views

Sentinel-2 projection shift

I recently observe a shift in the geographic projection of Sentinel 2 data. Please see the screenshots below for clarification (Granule T33UXP, Band 8 only). The first image was taken on 20160314, the ...
1
vote
2answers
60 views

Reproject raster without projection info

I'm pretty new to gdal and got a presumably easy question for experienced gdal users. My problem: I have a raster ascii file of which I don't know the projection or epsg code. However, I want this ...
2
votes
0answers
42 views

Calculating Area for data in WGS 84 using ArcGIS for Desktop? [duplicate]

I am using ArcGIS 10.1.1 for Desktop on my laptop. When I try to calculate the area in WGS 1984 the area is disabled. If I work in one projection, say WGS 1984, and calculate area in another ...
1
vote
2answers
49 views

Reprojecting raster from one CRS to another?

I have a .tif raster file which is based on some projected coordinate system (for example: NAD 1983 State Plane California). I would like to export this raster as a .xyz file, but also reprojecting it ...
1
vote
0answers
25 views

Gdalwarp UTM reprojection causes image distortions

I'm trying to re-project Sentinel-2 images to a common UTM zone in order to create a mosaic. For this I'm using gdalwarp with the following syntax: C:/OSGeo4W64/OSGeo4W.bat; gdalwarp -t_srs ...
0
votes
1answer
25 views

Shape files are not lining up [duplicate]

I have two shapefiles, with the same projection but they can not overlay. I understand that the extent is different, but i can not figure out how to change it? Here are the tow layers properties : ...
0
votes
0answers
19 views

QGIS projection changes only when saving as PDF [duplicate]

The issue I'm facing is that when using a print composer to generate a PDF or image with a google earth / bing backdrop the projection of my layers appears to change from what is shown in ...
3
votes
1answer
27 views

How to obtain attributes of a point layer that falls within a polygon layer of different CRS

I have created my own vector grid polygons in QGIS 2.12.2. This creates a new layer to my project, but it's projected in a "generated projection". I want to view the attributes of points that fall ...
0
votes
0answers
36 views

Projecting a layer to another CRS changes the actual distance

I'm trying to generate a buffer around some 1,000 points. My layer is on WGS-84, so I understand I need to save the layer with a different CRS that works with meters (Israeli one - ITM). However, when ...
1
vote
1answer
44 views

Installing/defining custom projection Nepal Modified UTN in QGIS?

I need to install/define a custom projection Nepal MUTM in qgis 2.14. But I don't know how to do it? Where will I get the projection code to use during defining?
2
votes
1answer
46 views

Circles and Projection in ArcGIS for Desktop?

I am using ArcGIS 10.2 and when I run topology on my feature class (which is in NAD 83 Lambert_Conformal_Conic) there were no overlaps. Once I project it into any projection I get overlapping polygons ...
0
votes
0answers
65 views

OpenLayers 3: projection for Yandex.Maps

I need 3 layers: OSM, Google and Yandex. My view, OSM and Google layer in EPSG:3857 projection, but Yandex layer seems to be in EPSG:3395, so it was displayed not correctly. I've defined the new ...
1
vote
1answer
59 views

orthogonal projection of a point onto linestring in PostGIS

I am trying to find the orthogonal projection of a Point (in 4326 SRID) onto a LineString (in 4326). The picture shows the objective. I have tried to use ST_Distance function, but in this case the ...
0
votes
1answer
32 views

How to divide line into three equal parts?

I have a problem with line division. I'm writing a program in JS/C++ generating KML files. I was trying to divide a line using my own function (which is correct on cartesian space): var part1Lon ...
1
vote
0answers
31 views

Need to match the Coordinate system on vector and raster datasets

I have a google satellite image that I am using as my basemap. The problem is that the shp files that I got from some source are projected in WGS 1984 UTM, Zone 42 North, Meter, but its GCS is ...
2
votes
1answer
36 views

Equal area world QGIS

when I use ArcGIS I normally use CRS: Cylindrical Equal Area (World) WKID: 54034 In QGIS I cannot find the same projection. When I re-project my file in ArcGIS and open it in QGIS it says I am using ...
0
votes
0answers
21 views

Error in using projection system with 1 standard parallel instead of using two?

I have to define a new projection system in ArcGIS but to define the system I am having the parameters for Lambert Conformal Conic Projection with 1 standard parallel instead of 2 standard parallel. I ...
0
votes
0answers
26 views

Is it possible to use DGPS device to take longitude, latitude and elevation values in local geodetic system (i.e. Indian Geodetic System)?

I want to survey a land in India using Indian Geodetic System (GCS Everest India Nepal ESRI: 37203 or EPSG : 24378). Can I define my own projection system in DGPS, so that it can take values in this ...
1
vote
2answers
74 views

Datum shift issue between OSGB1936 and WGS84

I have to work between OSGB1936 and WGS84 and BOTH of these data sets started out life as OSBG1936 BounaryLine data. I thought I was just at the end of a full revision of my master mapping until I ...