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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2answers
18 views

Selecting the correct projection for NAD_1983_HARN_WISCRS_Bayfield_County_Feet

I am trying to map the following projection but having issues finding a one that works. I ahve used http://prj2epsg.org/search which gives a few results but none seem to work that well. ...
0
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1answer
50 views

What would a map of the world look like if lat/longs were treated as projected coordinates? [duplicate]

I'm not quite sure if I'm phrasing this right. It's just occurred to me that lat/longs are two dimensional coordinates like any other projected coordinate system, so it's presumably possible to create ...
11
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3answers
4k views

Official term for latitude longitude coordinate system?

May I know what is the correct specific term for latitude longitude coordinate system? With "Geographic Coordinate", it seems to be a general term for every other system?
0
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0answers
36 views

Equal Area Projection for Indonesia - Standard Parallels

I am trying to do area computation stuff over whole of Indonesia and as such, am using the following projection: http://spatialreference.org/ref/esri/asia-south-albers-equal-area-conic/ To make this ...
4
votes
1answer
268 views

Calculating Grid Convergence for Lambert Conformal Conic

What is the formula to calculate Grid Convergence angle (angle between true north and grid north) for Lambert Conformal Conic projection for a given location. Searching online, I have been able to ...
0
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0answers
34 views

Proper projection name for NAD83 2011 revision

I have two PRJ files, one from ESRI and another from some custom GDAL/OGR code I wrote (pasted below). I was trying to have both work in NAD83 UTM10N with the 2011 revision. The ESRI file has 2011 in ...
0
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1answer
36 views

projection for high accuracy small areas

I need to convert (lat,long,height)points into a cartesian system for an area as small as 40kmx40km or even 10kmx10km. I'm currently using the UTM projection, but there are some issues regarding ...
5
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4answers
14k views

Convert latitude and longitude into northings and eastings

Hi I have the following UK postcode dy8 3xt and know that the latitude and longitude is:- 54.452772 -2.156082 I also know that the Eastings, Northings for the postcode is:- 389490 283880 ...
0
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0answers
58 views

Create Envelope based on center point

I see in the Java SDK : https://developers.arcgis.com/java/api-reference/com/esri/core/geometry/Envelope.html they have : Envelope(Point center, double width, double height) Creates an envelope by ...
1
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3answers
556 views

Why does my map look stretched out?

I've decided to give this map design thing a go - I downloaded the USA counties shapefile from National Atlas, exported them to SQLite from QGIS, and then linked the SQLite file in Tilemill, and this ...
1
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1answer
46 views

arcgis 10.2 .shp with no projection info but .xml file

I need help opening a shp file which has no projection info in ArcGIS 10.2 I have .shp , .shx , dbf and .xml file. The .xml file details are below . QUESTION : can i make .proj from below ...
1
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2answers
56 views

Error when creating data with special characters and numbers [duplicate]

My code will not project and store the feature layer in the scratch.gdb. "ERROR 999999 ... The table name is invalid. The table was not found. [17_5330_51961Lake]" The interpreter doesn't like "-" ...
1
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1answer
234 views

Converting Long/Lat into X/Y in the same coordinate system

I have a text file with two fields including Longitude and Latitude in degrees. I need to convert this into two fields that contain these values in X and Y. The source and destination coordinate ...
1
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0answers
41 views

Spherical Mercator - World bounds

What are the correct world bounds in the Spherical Mercator projection (EPSG:3857 and EPSG:900913) In some source I got those bounds see this link in the maxExtent parameter: minx: -20037508.3427892 ...
0
votes
0answers
26 views

Are there standard math formulas for esoteric map projections (like Dymaxiom)?

I come from graphics programming, I have been mucking about making map apps with more interests in map projections. I have a simple 2D tile map, but I'd like to convert that to some of the more ...
1
vote
1answer
41 views

Good projections for Middle East and North Africa in D3?

I'm a data visualizer who's mostly worked with US data, and I'm familiar with AlbersUSA project. However, I'm going to be doing a series of graphics on the Middle East. Any suggestions or interesting ...
3
votes
2answers
223 views

Is WGS84 a Coordinate system or projection system? [duplicate]

WGS84 is often referred to as a "projection system" and sometimes it is confusing to me about what a "projection system" is and where WGS84 falls in one. Could someone please clear that up for me?
1
vote
1answer
45 views

Raster appears like polygon in Arcmap

I copied rasters across into my geodatabase for a client but when they open the raster dataset in ArcMap they appear in tiles as shown in the image below. When I drag and drop individual rasters over ...
2
votes
2answers
675 views

How to re-project the EASE (Equal Area Scalable Earth) grid with a ~25 km cylindrical projection to WGS84 0.25 degree?

I have nc files. from the metadata ,the projection is cylindrical and the resolution is 25 km: indrical NC_GLOBAL#ease_resolution=25 ...
35
votes
11answers
15k views

Identifying Coordinate System of Shapefile when Unknown?

I have a Shapefile but its coordinate system is Unknown, and there is no *.prj file. How I can identify it now? Are there any tools that could help?
1
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0answers
11 views

Set of intersection points in trilateration / multilateration [duplicate]

Like in this post I will get a set of points (3 or more) with latitude, longitude and distance (in KM) information to find out the target location. A distance could be about 500 KM. The circles ...
0
votes
1answer
47 views

Google Earth image projection transformation question

I have taken a JPEG image snapshot of an area on google earth. Within it I marked and record the coordinates of the four corners. I then added and georeferenced the image to a map I was already ...
0
votes
1answer
51 views

Equidistant Cartesian projection for NYC

I'm working on a project in which I cluster locations in New York City based on their distance. My dataset contains latitude and longitude and thus I'd like to project it to a 2D Cartesian space in ...
0
votes
1answer
38 views

Open Source Webmaps and Geotiffs

I have recently started to learn how to use open source web maps, and have come across the following issue. When using geoserver and geo explorer (part of the open-geo-suite), I seem to get an ...
0
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0answers
54 views

Importing spatially referenced geotiff from MicroStation V8i into ArcGIS

I can't figure out how to properly import a geo-referenced raster into ArcGIS from MicroStation. Both the design file and the Arc data frame are in the same projected coordinate system, which is ...
0
votes
1answer
28 views

Growing error from west to east when overlaying raster and shape

I am using a shape of Austria from gadm.org which I want to overlay with a netCDF file in R. As the netCDF has projected coordinates in EPSG:31287, I have reprojected the shape using FWtools and the ...
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1answer
287 views

Creating custom projections with Proj4

I'm reading into how to customise projections with Proj4 - specifically to achieve tilted projections such as the example below (from vis4.net) The Proj4 literature is pretty heavy going and having ...
1
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1answer
81 views

Determine XY offset in meters between two lat/long points (EPSG:4326), and accurately recreating point locations using XY offset

I have two tables in EPSG:4326, one for home locations and one for site locations. I need to be able to generate the XY offset in meters between the home location, and the site locations. I then need ...
2
votes
1answer
87 views

How to modify or create a wider UTM zone?

am working on a project to do country-wide mapping using projected coordinate system such UTM. However, the country (Zambia) is covered by three UTM zones, namely zone 34,35 and 36.I have read ...
0
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0answers
37 views

Finding gps projection of 3d photo?

I have an aerial photo from Paris and I would like to plot gps paths and 3d surfaces on top of it (using R, python, etc). . The problem I have is converting my gps coordinates to 2d coordinates on ...
0
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0answers
31 views

Escaping the MODIS Swath Projection with GDAL: MOD06_L2: MRT Swath Tool not working

Stackexchange, I am looking at ftp://ladsftp.nascom.nasa.gov/allData/6/MOD06_L2/2012/222/MOD06_L2.A2012222.0800.006.2015062054108.hdf Trying to get the SDS (in WGS84 Projection and as GeoTiff): ...
6
votes
2answers
553 views

Calculating projected distance using ArcObjects?

I am pretty new to this and I am not sure I understand all the concepts, so I might be using words wrongly or obviously not getting some details right. We mean to do those calculations within our ...
0
votes
1answer
62 views

Converting GCS NAD 1983 to CA state plane

I have a polygon shapefile in GCS_North_American_1983. I'm trying to project it into NAD 1983 StatePlaneCalifornia III Fips 0403 (US Feet). This is my original file. When I run the project tool, ...
0
votes
0answers
60 views

How to project WRF data (lat/lon) onto ArcGIS maps

I have climate data generated using the WRF model, in lat/lon format (lambert conformal projection), in an Excel file. I'm looking to project / overlay this data onto a map of the UK using ArcGIS, ...
1
vote
1answer
230 views

Difference between Geographic and Projected coordinate systems?

What is the difference between a geographic coordinate system and a projected coordinate system?
13
votes
1answer
11k views

Which is correct projection in ArcGIS Server for EPSG:3857/900913?

I want to publish a mapservice in ArcGIS server, which will be overlayed on Google Maps or Bing Maps. For this, the Map Service needs to be in EPSG:3857/900913. The Google Maps projection is supposed ...
1
vote
0answers
54 views

Rectangular bounding box curved in D3.js

I am trying to project polygons to a map with a static background image using D3.js. The polygons looked slightly off in relation to the background so I drew the bounding box of the image, and sure ...
1
vote
1answer
63 views

Projection of Boston housing data

Boston housing data provided by GeoDa center is a well-known dataset. GeoDa Center provides this data in shapefile format. A metadata file included in the download indicates that the data use ...
1
vote
3answers
82 views

Best projection / CRS for short-distance based analysis?

I'm having a bit of meltdown about projections and coordinate reference systems, and was hoping for a few pointers. I have 3 GIS projects, at 3 sites in Europe (the largest of which measures about ...
0
votes
1answer
66 views

Problem to create composer with open layer plugin in QGIS

Creating layout in composer I am facing a problem of dislocation of shp file and google earth image ( which I am using from "open layer plugin") Version 2.4.0 Chugiak (Mac) In the first image shows ...
2
votes
0answers
97 views

Align vector and raster layers with D3

I have a geocoded raster image that I want to use as the background to a vector map with D3.js. The screenshot shows the layers in QGIS (grey is raster). Here's the markup for the map: <div ...
5
votes
1answer
158 views

What projection is this and how to use it in a GIS?

I have a request to do a map in non-standard projection: (source: http://www4.agr.gc.ca/AAFC-AAC/display-afficher.do?id=1263246127905&lang=eng) I couldn't manage to find it my materials. As well ...
3
votes
2answers
580 views

How do I reproject one raster to match another's in GRASS

I have two raster layers, A and B, which have information about the same location but have different projections and datums. How can I reproject layer A to match the projection and datum of layer B? ...
0
votes
0answers
34 views

Converting coordinate system of feature layers and datasets programmatically

I am trying to convert coordinate system of featurelayer and datasets using ESRI.ArcGIS.DataManagementTools.Project . The tool works fine in ArcCatalog . I have doubts about the parameters i am ...
1
vote
1answer
49 views

Projection bug between overlay and base layers

I am making a WebGIS application for a course and I am trying to integrate some nice base layers like OMS, Stamen, and Bing Maps with my overlay layers that are for Bolivia from a Bolivian map ...
0
votes
1answer
691 views

ArcGIS Desktop, shapefile and EPSG code

Why a shape file with CRS WGS_1984_UTM_Zone_22N en Arcgis has a differrent prj file than the EPSG:32622:WGS 84 / UTM zone 22N WKT ? Can I replace Arcgis .prj file with EPSG:32622 WKT ...
0
votes
1answer
89 views

Can MapQuest tiles be used in an Openlayers 3 map with a non-standard projection?

I have a map in OpenLayers 3 with raster and GeoJSON layers that are in an UTM projection and I would like to use MapQuest tiles as a base map while keeping the map and layers projected as UTM. Is ...
1
vote
1answer
166 views

How to project WGS84 raster in lat/long to WGS84 UTM in ArcMap 10?

I know this is suppose to be simple and I've found similar questions. However when I try to do the same (data management tools > projections and transformations > raster > project) inserting input ...
0
votes
1answer
54 views

Convert from WGS84 to 2D projection

I have a map in the form of .bil & .hdr using WGS84. I'd like to convert this into another map using a 2D projection while keeping the lat/long information. What I'd really like with this new map ...
2
votes
1answer
51 views

X and Y after Albers lat and lon transformation

that is probably a very obvious question but it is melting my brain: when transforming lat and lon to [x,y] (for instance using this code https://gist.github.com/RandomEtc/476238) I get the ...