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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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 ...
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24 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 degree....
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43 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", ...
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12 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 ...
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49 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 ...
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2answers
69 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: https://www.openstreetmap.org/...
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61 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 ...
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2answers
46 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 ...
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26 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 ...
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2answers
110 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 ...
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3answers
308 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 ...
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141 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 ...
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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 ...
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2answers
71 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 ...
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45 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 \"+proj=...
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1answer
27 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 :
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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 designer/...
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1answer
28 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 ...
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38 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 ...
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1answer
63 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?
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1answer
52 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 ...
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147 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 ...
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1answer
73 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 ...
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1answer
54 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 ...
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38 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 '...
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1answer
52 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 ...
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26 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 ...
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33 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 ...
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2answers
82 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 ...
3
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1answer
137 views

How to calculate the area of a polygon in a WGS84 Shapefile in QGIS?

I am using QGIS 2.12.3 Lyon and I want to calculate the area of my polygon in m2. For that I used the tool provided by QGIS, but the result is not as it should be. I got from QGIS 50 ha, while I got ...
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56 views

Pacific-wide Projection for distance?

I have a data set of ~3500 points located across the Pacific Ocean, and am looking to measure the distance from each point to it's nearest coastline to identify the "host" country. I had originally ...
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19 views

Create points with planar location data

Slightly confused. I need to add 3 point features to an already created map project (state plane projection). The description given to me about the location of the points is the planar location, so no ...
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1answer
42 views

PTV_Mercator correctly recalculated to WGS84 EPGS:4326 but not correct on map

I have recalculated PTV_Mercator (PTV Spherical Mercator EPSG:505456) coordinates to WGS84 EPGS:4326 coordinates in Excel. And when checking them on Google Maps they show up correct. But after ...
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2answers
145 views

What's the accuracy of Web Mercator EPSG:3857?

Are there any references on the accuracy or (min/max/avg) error of Web Mercator when it comes to e.g. distance calculations? For the sake of completeness, I haven't found any reference to the ...
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2answers
128 views

Why do my XY cordinates not make sense / show up in ArcGIS 9.3?

In the Add XY Data menu I selected to add a table containing UTME and UTMN coordinates. I selected a WGS84 projection b/c that's what the GPS device that meade the readings was set to use. However, my ...
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34 views

Issue on project CRS loading a georeferenced image

I have a georeferenced image in EPSG 26714. When I load it in Qgis 2.14 the project CRS is set to 4326. I asked for the layer properties and the CRS registered is 26714. When I open the same file in ...
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1answer
53 views

Projection issue with WMTS in QGIS?

I'm trying to connect to this WMTS in QGIS, but I'm having issues that I think are projection related. I use the Add WMS/WMTS dialog and enter this url: http://www.vernoncounty.org/arcgis/rest/...
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1answer
26 views

Given WGS84 bounding box, is there service that returns most accurate projection to use?

I'd like to find a service to convert lat/lon in WGS84 to an arbitrary coordinate system in metric that will be the most accurate for my bounding box. Does something like this exist? For instance, ...
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24 views

Multi Projections w/ openlayers 3

I am stuck and I need your help! My app needs to change projection and/or layer on click. I have a layerchooser class which controls the clicks (works well with alert("hellool3")) My main class is ...
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1answer
142 views

Distance measure of ST_ClusterWithin

I use SRID 4326(WGS 84). So what is the measure of distance in ST_ClusterWithin . m, km, degree ? I ask it because in documentation it only says: geometry[] ST_ClusterWithin(geometry set g, float8 ...
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1answer
77 views

How to use latitude/longitude with projection in R [duplicate]

I am using the SABS dataset: http://nces.ed.gov/surveys/sdds/sabs/ In particular, let's say I am using the "SABS_1314_High" layer. (This provides the school attendance boundaries for many US school ...
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13 views

Problem in adding geojson to WMSTile layer

I have problem with adding my geojson file to WmsTile (I see this layer). Here is my code with sample of geojson :
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57 views

How to deal with different projections in PostGIS spatial analysis?

I am doing something wrong, but try as I may, I can never seem to grasp all aspects of how to project layers in GIS. I am working with two files: 1) The USGS maintains a list of locations with ...
2
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1answer
38 views

My point shape file having missing spatial reference information

I am using ArcGIS 10.2.2. I got a shape file with points representing spot elevations in my study area. This file has been provided by a third party institution. The coordinate system is missing ...
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1answer
364 views

OL3 How to reproject vector layer on fly (ol 3.14)

I have a map in OL 3.14 with a WMTS in a specific epsg. I add a WMS layer in an other projection and it's ok, OL reproject right. But with a vector Layer (geoJson, in the same projection as WMS), ...
2
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1answer
59 views

Calculating Geometry in ArcGIS without a Projected Coordinate System

For my project, I want to calculate the geometry of individual polygons in my layer to find area and perimeter, however it is greyed out when I try to use this tool. Beforehand, I set the data frame ...
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1answer
41 views

How does ArcGIS project-on-the-fly in an Export Data task, to a different datum and custom projection?

I need all my data in an equal area projection to for an analysis that will calculate area at the North American Scale. The projection I want is custom, it has the following settings. I will be using ...
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0answers
22 views

Unknown coordinate system produced in 1980 by Japanese company in North Philippines

I am having the same difficulty with one of the report produced in 1980 by Japanese company. The grids format also N 38,578, E 41,400. The project is 390 kilometers north of Manila. I would like to ...
3
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1answer
103 views

Rotating ~90° using Two-Point Equidistant projection with Proj4

I'm trying to rotate a tif raster in R using Proj4's Two-Point Equidistant projection - I think the only way to rotate spatial geometries to custom angles. But I'm finding the operation gets very ...
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72 views

Reprojecting a raster file in R

Help! I have a number of rasters from different sources with different projections. I want to reproject the rasters into a common projection (Eckert IV), somehow line the grids up, and then overlay ...