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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12 views

Georeferencing uneven/irregularly gridded rasters

I'm trying to take a set of NetCDFs and turn them into georeferenced datasets using GDAL. However, the only Geospatial data is a set of 2-D lat/lon arrays. The projection type is not lat/lon. THe ...
0
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1answer
22 views

ArcMap ModelBuilder: problem with %name% variable when used in iteration for projection

I have prepared a model which should project all shape files ( currently in MUTM 81) in a folder to MUTM 84. But when I use “%Name%” in output dataset for geodatabase as “D:\Soil ...
2
votes
1answer
7 views

Geowebcache alias for custom projections

Is there a way to configure a projection alias in geowebcache? E.g. if I would like to advertise projection EPSG:25833 and EPSG:32633 to the client, while requesting tiles from the backend using ...
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32 views

Projecting NAD83 on-the-fly to WGS84 [duplicate]

I have a point feature class in a geodatabase that uses WGS84 as its SRS. A colleage of mine created points in this feature class using an external database containing lat and long values. However, ...
2
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2answers
53 views

Assigned projection and an unprojected WGS84 geographic coordinate system

I am to be submitting a shapefile for review but the first two requirements have me confused. Are these requirements conflicting or am i just not understanding the question? Requirements: The ...
1
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0answers
18 views

QGIS - Label polygon with different projections

I have a polygon layer projected in an UTM. In properties I checked 'show all labels for this layer'. Does anyone know why the label does not show until zoom 15:1 in QGIS with CRS-4326, while in ...
3
votes
1answer
32 views

USA Contiguous Albers Equal Area Conic to miles

My data is in USA Contiguous Albers Equal Area Conic projection. How can I convert the USA Contiguous Albers Equal Area Conic projection to miles?
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13 views

Reprojecting: Different results in OGR and PROJ.4 for EPSG24373 (India) [duplicate]

I need to convert EPSG4326 lon/lat tuples to EPSG24373 (Kalianpur 1880 / India zone III). However, when using the Python bindings of OGR and PROJ.4 (pyproj), I get different results. I wrote the ...
1
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1answer
49 views

Determining Projection using QGIS?

I am very new to QGIS and I am trying to determine the spatial projection and the units of distance of a certain raster file. The closest thing I can find is the CRS, which is set to some sort of ...
0
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1answer
25 views

How to generate a tiled map from a spherical mercator SVG?

I'm not a GIS person; this is really just a side task, so I probably have terminology/strategy incorrect; I would ask that you please bear with me. I have the following requirements for a Qt-based C++ ...
0
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1answer
27 views

Projection issues with merging files. [duplicate]

New QGIS user, 2.6 Brighton. My project CRS is default to Nad83ft / N.Carolina (US). I loaded various polygon and line (provided to me) that have various CRS's but they still show correctly in place ...
3
votes
0answers
62 views

Why does field calculator compute area in square meters?

I am using EPSG:102748, and have set my Settings/Option preferred measurement units to ft. My CRS is NAD_1983_StatePlane_Washington_North_FIPS_4601_Feet, and when I use the measure tool, it returns ...
1
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0answers
29 views

Unknown coordinates in Shapefile, projecting doesn't give expected results

I'm reading a Shape file (four files actually, .dbf, .prj, .shp and .shx) containing polygons representing certain areas in my neighborhood. For this I use C# and a library called DotSpatial. I can ...
1
vote
2answers
37 views

GDAL - Warping raster to new domain/resolution/projection causes data loss

I am attempting to warp a GTiff from a lat/lon projection to a higher (~2x) resolution Polar Stereographic grid. In the output GTiff any cells north of 64 deg lat become NaN instead of their actual ...
0
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0answers
11 views

Retrieve Extent of Map in specific projection [duplicate]

Geoserver WMS Layer and WFS Layers that I display with OpenLayers. MaxExtent of the map is hard-coded. map = new OpenLayers.Map({ div : "map", projection : 'EPSG:31466', units : "m", ...
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0answers
53 views

Length difference between Google Earth and ArcGIS for Desktop?

I have drawn a complex path with multiple vertices in Google Earth (GE) Pro and its measurement property is shown as being 2,460 nm. It is located East of Australia. If i import this KML into ArcGIS ...
4
votes
1answer
57 views

Equal area projections with different area results in ArcGIS for Desktop?

Using ArcGIS, I have to calculate areas of huge polygons all over the Pacific Oceans betwwen 20N and 30S. I have been trying different Equal-areas projections (Cylindrical and sinusoidal for example) ...
0
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0answers
31 views

WGS 84 - NAD 83 with a twist

I have a dataset of GPS field point collected received in WGS 84 but displayed in NAD 83 UTM. I used a field point to inform a total station for a reference starting point, so all my total station ...
2
votes
1answer
58 views

How to re-project shapefile to be compatible with Openlayers satellite imagery

The goal: Visualize a map using google's satellite (and projection) using my collected points. Right now I have a shapefile of my collected points from surveying. I created it by adding my csv file. ...
1
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0answers
25 views

Resampling methodology when projecting a raster

When projecting an SRTM raster with "Project Raster" tool in ArcGIS10.2, what is the best resampling methodology, bilinear ot cubic convolution?
0
votes
1answer
42 views

Combining UTM zones into one solid map

I have an area, example 4000m x 4000m. So, 4x4km. The origin can be placed anywhere, maybe in center, maybe on the top-left, nevermind. Now, I want to fill this area with some stuff from OSM. I read ...
0
votes
1answer
26 views

ArcGIS 10.2.2 Does “Batch Project” work for different input datum?

I have two vector data sets - one is in NAD27 and the other is in WGS84. Normally I reproject one at a time. But can I just use 'batch project' to reproject both of them to NAD83 at once? I was not ...
1
vote
1answer
56 views

How can I project geojson borders on the google earth tiles in leaflet?

I started working with leaflet and google earth tiles. I want to add borders on my map so I tried to use the countries geoJson Data as a layer on the map. The problem is that the json borders ...
0
votes
1answer
25 views

How does ArcGIS calculate distance of 2 points in custom projection?

I used a software called WRF to export (lat,lon) and want to draw them in ArcGIS. but in this software, all the coordinates are caculated under this settings: the earth is as a sphere which the radius ...
0
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0answers
16 views

gdalwarp for warping a Space View Perspective or Orthographic tiff

i need to warp an image with a Space View Perspective or Orthographic project. What is the parameter for the gdalwarp -s_srs "+proj=???? +ellps=WGS84 +datum=WGS84" -t_srs EPSG:4258 in.tiff out.tiff ? ...
0
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0answers
24 views

OSGEO/GDAL and Rotated Pole Grids

I have a netCDF containing a raster in a rotated pole grid. I have a script for converting the desired information to GeoTiff, however it requires projection information in the form of WKT string. ...
1
vote
2answers
48 views

Is it possible to redefine a projection in QGIS?

Is it possible to redefine a projection in QGis? It seems like the shape files offered by Agiv (a Flemish agency) differ slightly from the definition that QGis has of EPSG:31370. I'm NOT looking to ...
2
votes
1answer
39 views

Which projections emphasise the Northern Hemisphere, other than Mercator?

I'm working on a project where I have data points in the UK, US, France/Italy, Hong Kong and Japan. I want to show a world map with mini charts at each of these locations. For this project, it makes ...
0
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0answers
20 views

How to georectify a fictive earth to a projection-less version

I have a picture of a fictive earth-like world. Now I would like to draw the outlines and then georectify this to a projection-less version. I really need the map unrectified. Because I want to ...
2
votes
1answer
64 views

Reprojection error

I have a lidar file (file.las) with the following spatial reference: Spatial Reference: PROJCS["NAD83 / UTM zone 11N", GEOGCS["NAD83", DATUM["North_American_Datum_1983", ...
2
votes
2answers
167 views

Project house on WGS84

I have imported a DXF file of my house in QGIS. I also included an openstreetmap layer in WGS84 which also displays my house as a square. Naturally, my house from the DXF file is placed in the ocean ...
2
votes
1answer
75 views

Why my Shapefile is not loaded into OpenLayers?

This is my website for test: http://www.cv.nctu.edu.tw/tonywang/shapefile-js-openlayers/ol_simple.html I want to put my Shapefile in OpenLayers. I found an example at ...
0
votes
1answer
30 views

ArcGIS Online & Mobile Apps Projection Support?

What is the level of projection/co-ordinate system and transformation support accross the ArcGIS Online family of apps ; ArcGIS Online Web Map Viewer (Desktop) ArcGIS Online Web Map Viewer (Mobile) ...
4
votes
2answers
36 views

Qgis - Projection Problem with EPSG:2272

I work in both Qgis and ArcGIS. Most of my data has been created using ArcGIS and all of my data should be in the EPSG:2272. When I add my data to Qgis, it does not recognize my projection and gives ...
2
votes
1answer
35 views

GCS transformation

I have a shape POSGAR 1994, I tested several reprojections and I cannot delete a displacement of about 100 meters with google earth. These are the shape data: PROJCS["POSGAR_1994_Argentina_Zone_5", ...
0
votes
1answer
27 views

Work order: project then resample, or resample then project

I'm working with 10m DEMs in northern New York, along the Canadian border (in ArcGIS 10.2). To complete a regional elevation map (and eventually slope, flow, etc.), I need to also include a portion of ...
0
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0answers
87 views

help with TMS (gdal2tiles) Openlayers 3 and custom projection

I work with a local italian projection (EPSG:3003 Monte Mario Italy zone 1) and I had loaded this projection in my project for evitate to reproject all of my data. I had created the tile pyramid with ...
2
votes
2answers
36 views

Georeferencing a map image with no precise projection info

I am trying to georeference a map that has meridians and parallels etc. but no projected grid displayed. I can get the coordinates of the meridians/parallels fine, so georeferencing should not be an ...
1
vote
0answers
20 views

QGIS (2.0.1): Field calculator for length not working - values way too high

Same problem as another thread: Field Calculator returning incorrect length and area values Trying to calculate length of a line shapefile, and field calculator is returning values that are way too ...
5
votes
1answer
47 views

Reprojecting a CSV file using ogr2ogr?

I am trying to convert a CSV with fields in one projection system (EPSG:27700) to fields in another (EPSG:4326). I have made a VRT file called landfill.vrt, in the same directory as my CSV file, ...
2
votes
1answer
38 views

Projection Issues with QGIS 2.6.1

I Started this yesterday and I was able to create the shapefile in QGIS but i need the projection to be in NAD 83 New Jersey State Plane (ft) Coordinate System, which I was able to change the layer ...
2
votes
1answer
68 views

Displaying map tiles from GeoPackage

Is it possible to translate tile requests from a mapping engine wanting Google Map style tiles into tile requests from a geopackage file? If not, where can I find information about how to create a ...
0
votes
2answers
77 views

cannot get ArcGIS to project a shapefile

I am using ArcGIS 10.1 (SP1). I got a shapefile with polygons representing some features of the landscape in my study area. This file has been provided by a third party institution. The coordinate ...
0
votes
1answer
21 views

why the graphics layer coming from the Geoprocessing service in WGS_84, is projected correctly on a Web Mercator Auxiliary Sphere Basemap

I have made a Geoprocessing service, which results (features) are in wgs_84 (4326). My map's spatial reference is wgs_84 Web Mercator Auxiliary Sphere 102100 (projected system) Considering that the ...
1
vote
2answers
47 views

Wrong projection reference in coordinate system - How can I modify the original coordinate system?

Working in Germany, where Gauss_Kruger is very often used (as well as ETRS1989_zone 32N), and trying to find out about WKID when I realised that on my machine, the projection reference of the ...
0
votes
1answer
39 views

How to re-project graphics returned from a geoprocessing service on the fly? [duplicate]

I have a geoprocessing service returning a feature-set in WGS_84. I want to show that graphics on the map using Arcgis JS api. As I can see my geometries are not re-projected on the fly, since my ...
0
votes
1answer
44 views

ArcGIS bufferzone projection

I have a point shp file of 445 points around the globe, that i need to create buffer-zone of 10 km around each point, the points shp file is in wgs1984 geographic coordinate and wgs1984 platte carre ...
1
vote
2answers
67 views

How are ESRI WKT projections different from OGC WKT projections?

Does anyone know the precise list of differences between esri wkt and ogc wkt projection format strings? I know there are various tools to help convert from esri wkt to ogc wkt, incl gdal utilities ...
2
votes
1answer
48 views

Kernel density estimation across multiple UTM zones

I'm trying to compare the spatial distribution between two groups of fishing locations (for each of several different years) in the Bering Sea (lat's ~53 to 65N, long's ~ -178 to -158W. My preliminary ...
0
votes
0answers
36 views

Correcting the shift of MapInfo data in QGIS 2.6 (and earlier too)

I often receive multiple .mif or .tab files and view them alongside shapefile layers in QGIS 2.6.1. Dragging one of the .mif files from a Windows Explorer window into a QGIS window will display the ...