A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions.

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2
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1answer
53 views

CSV to Layer from a Delimited Text File in QGIS

enter image description hereI am importing a CSV file into QGIS using the official instructions on their page: http://www.qgistutorials.com/en/docs/importing_spreadsheets_csv.html. For some reason, ...
0
votes
1answer
35 views

What unit is the Shape_Length field in for the GCS_North_American_1983_CSRS projection?

How can I convert these to values to meters? I'm trying to use the Densify tool but can't because I'm assuming the distance field is tied to Shape_Length.
4
votes
2answers
111 views

Are Australian Height Datum and GDA94 applicable to Christmas, Lord Howe, and Norfolk islands?

I've been asked to recommend a mapping coordinate reference frame for use for Australian mapping, which I've said AHD for the vertical component and GDA94 for the the horizontal component. However, ...
3
votes
1answer
33 views

How to map a dataset with multiple datums

I have a dataset (in excel) of species with the coordinates in which they were sighted, collected by many different people over decades. Aside from coordinates, the dataset also specifies a datum ...
2
votes
0answers
32 views

Using points in polygons tool with QGIS and CRS?

I am working with 2 layers. 1 shows a polygon of a district and is in CRS EPSG 4326 and another layer (address layer) is in CRS EPSG 3082. I right click the address layer and "save as" and specify ...
5
votes
2answers
85 views

Which CRS with units in meters for central Germany?

I found several questions in regard of reprojecting data into a CRS with unit of meters and what CRS to use. Usually the counter question is, "for what region, on what scale" and there the discussions ...
1
vote
1answer
39 views

How to use openlayers 3 with epsg 32749

I want to set coordinates of my map in epsg 32749. var view = new ol.View({ center:ol.proj.transform([43037,9138591],'EPSG:32749','EPSG:900913'), zoom:10.8 }); var map = new ol.Map({ ...
2
votes
1answer
32 views

Using Openlayers and Georeferencer plugin (with solution) in QGIS?

Let me start by saying that I am total noobie at QGIS, so this might be obvious to everyone else. I spent hours yesterday trying to georeference a map. I needed to georeference it against vegetation ...
2
votes
0answers
49 views

Equal distance points on polylines

In QGIS 2.10.1 I want to create a point layer out of my polyline shapefile and all the points shall have a fixed distance (in meters) while I use WGS84 as coordinate system. So what do I use for this? ...
1
vote
0answers
25 views

Loading AHN files correctly into MicroDEM?

In the netherlands we have the ahn elevation data files(to be found on: http://geodata.nationaalgeoregister.nl/ahn2/atom/ahn2_05m_ruw.xml) (based on rd projection). If i imort these files into ...
3
votes
1answer
77 views

GeoProcessing Tool Parameter: CoordinateSystem vs SpatialReference

So I'm adding a couple tools to my python toolbox. Most of the time I just used CoordinateSystem and leave good enough alone. Today I tried SpatialReference and noticed the result is the same. The the ...
3
votes
2answers
119 views

Which SRIDs to use for what tasks?

I try to understand the idea behind the different Spatial Reference Identifiers. I understand that the different SRIDs identify different projection views on the earth and that they are important for ...
3
votes
1answer
407 views

How to find out coordinate system to use pre-1940 Soviet map as raster

I am trying to use this map as a raster but I am not having any success in QGIS. I tried in Georeferencer to open raster and used these settings: Transformation: Thin plate spine Resampling Method: ...
5
votes
2answers
141 views

Coordinate/projection system issue in ArcGis 10.3

I am new in this community and I am also a new user of ArcMap. I am facing a problem, my shapefiles are in a GCS WGS 1984 and I have to add a new shape file that is in a projected coordinate system ...
1
vote
1answer
54 views

Which coordinate system does MapTiler use for its “Photoshop Overlay for Google Maps” page?

I am attempting to use this MapTiler webpage to create a background image that I can position my image over and then use GDAL to generate tiles. My process is: Position the map on the MapTiler page ...
1
vote
1answer
61 views

Bringing multiple non-projected CAD .dwg files over to ArcMap as a projected ESRI .shp

Is there a streamlined method to bring over CAD .dwg files that have unknown coordinate systems into ArcMap as ESRI .shp files and project the coordinate system of each new .shp accordingly? I have ...
1
vote
0answers
31 views

Get spatialReference Domain, with XY Precision

I'm trying to get a spatialReference domain from prj file by using the function : private void ConstructCoordinateSystem(bool highPrecision) { // SpatialReferenceEnvironment is a singleton object ...
1
vote
1answer
70 views

Understanding precision of ArcGIS geodatabases?

I would like to know how precision is handled in ArcGIS software. Is it using a real Computer Algebra System engine, an arbitrary precision library or do others tricks to handle precision ?
1
vote
0answers
18 views

How can I quantify whether locations of one 'type' are closer to one another compared to a second 'type'?

This might have an obvious answer but I'm new to GIS and can't seem to find the right technique... I've got GPS points for a bunch of households and have calculated the distance (in km) between each ...
1
vote
0answers
77 views

Flat Map that can go thru North Pole

Is there any map SDK or tool that can show the navigation that passes through the north pole in a flat way? Basically If I use a Mercator projection map it is only flat and cannot show the north part ...
0
votes
0answers
59 views

Making DEM and Landsat Image Coincide in ArcMap?

I have a DEM with these properties: Spatial Reference: GCS_WGS_1984 Angular Unit: Degree (0.0174532925199433) Datum: D_WGS_1984 Raster Information: Columns and Rows: 3051, 2426 Cell size: ...
1
vote
2answers
26 views

proj4text column blank for SRID 97688 - causing errors

So apparently a blank proj4text field causes errors when adding a record. When you enter something close to correct into proj4text, the records get inserted without error. So what is the correct value ...
0
votes
0answers
18 views

Using Image Coordinate System in ArcObjects AxMapControl

In ArcMap you can display images in the Image Coordinate System (ICS) by choosing Focus on Image in the Image Analysis window. Is it possible to achieve the same thing in ArcObjects .NET AxMapControl ...
4
votes
1answer
129 views

How to correctly import a raster file with these metadatas into Tilemill?

I have a GeoTIFF file for which gdalsrsinfo reports this: PROJ.4 : '+proj=utm +zone=32 +datum=WGS84 +units=m +no_defs ' OGC WKT : PROJCS["WGS 84 / UTM zone 32N", GEOGCS["WGS 84", ...
1
vote
1answer
55 views

Setting the map extent - spatial reference for wkid 27700

I want to set the extent of my basemap on application start but when I add the following code it doesn't seem to like it and renders a blank div? map = new Map("map", { logo: false, extent: ...
1
vote
0answers
52 views

Is it possible to set points without coordinates onto a map?

I have the following Situation: csv-file with 1000 lines of measurements. These measurements were done indoor in a building without GPS. The measurement-system allows to set "markers" at any time. ...
5
votes
1answer
105 views

Clear “Recently used coordinate reference systems”

After using some non usual SRC for demonstration purpose, I wish to clear my "Recently used coordinate reference systems" list for the sake of praticity. Is it possible? QGIS 2.10.1
3
votes
1answer
52 views

QGIS field calculator returning results in different units?

I am trying to use QGIS to get the perimeter, area, bounds width, and bounds height of US congressional districts, using the US Census TIGER shapefile. I loaded the shapefile into QGIS, set my CRS to ...
0
votes
0answers
26 views

Project (Data manager) plus Add XY results in new data being rotated

I have point data in decimal degrees. When I want to convert to local UTM data I have going through the usual Project (Data Manager) to project from LAT/Long to UTM and then when I add XY to the new ...
1
vote
1answer
56 views

voronoi / thiessen different CRS

I have the following problem in QGIS: I try to create voronoi polygons based on a shapefile (points; standard WGS84). The newly created voronoi polygons layer seems to be ok for the WGS84 CRS. But ...
0
votes
3answers
78 views

EsriLeaflet - Problem with special german projection

I got a service with EPSG:3068 (http://epsg.io/3068-15949) My test code to diplay this service on an Leaflet Map with Esri-Leaflet is as following: <!DOCTYPE HTML> <html> ...
2
votes
1answer
42 views

OSGB feaures not aligning with OpenStreetMap basemap even though Data Frame and Features are all in OSGB?

I have a task to report features in OSGB (British Nat Grid) over an OpenStreetMap basemap. I have done this successfully in past with line up of features on basemap, but this time I cannot get the ...
1
vote
0answers
23 views

OS Open Source data tif files

I'm a new QGIS user and am having trouble adding tif files from OS VectorMap District. I get them on to the map but they always appear in the bottom left hand corner, which I would guess indicates a ...
1
vote
1answer
58 views

What kind of coordinate system has values like 555,19 - 251,48?

I am trying to identify a coordinate system used to give positions to caves in France. The Emergence du Ressel is at 555,19 - 251,48 (decimal coordinates 44.56194, 1.77167) and Source de Landenouse ...
0
votes
1answer
64 views

Are ArcGIS' UTM zone designations simplified?

I was recently given a document showing the UTM zones as they appear over the whole Earth. Each zone is 6 degrees longitude by 8 degrees latitude. A numbering system proceeds from 1 to 60 from -180 ...
0
votes
1answer
79 views

Shapefile extent units in decimal degrees but values in meters

I have a shapefile that had its geographic coordinate system defined as the projection NAD 83 UTM Zone 18. The scale of the layer was correct but it was at the wrong point in space. I redefined the ...
3
votes
0answers
68 views

Which spatial-reference system is used by the Haversine formula?

I've been reading Pro Spatial with SQL Server 2012. It discusses the various spatial-reference systems (SRS) that can be used when defining a coordinate system. According to the book, Google uses ...
0
votes
0answers
45 views

Editing Coordinate projection

I have overlaid a shape file over a raster and observed a small shift south-north. i have tried changing the false northing successively to shift it south (0 to as much as 100000) as suggested by ...
1
vote
1answer
51 views

how to get area in qgis 2.6.1 brighton?

I'm using QGIS 2.6.1 brighton, and I have a problem in computing the area of each layer. I was actually working on the map of our municipality and I would like to compute the total area of the ...
0
votes
1answer
43 views

Adding a point-shape file to a raster image with no spatial information

I have a raster image (JPG) of a fictional map from a fantasy book. I want to add a point-shape file in order to show main events from the book upon the map. My map has no spatial information (as ...
1
vote
1answer
88 views

When a file is exported, the co-ordinate system options: Layers source data or Data Frame. Does it convert these on the fly

If I have a shapefile in ArcMap and I go to export it, the export data dialog comes up with a mandatory choice of using the layer's data source coordinate system or the data frame's coordinate system. ...
0
votes
1answer
27 views

Get geotiff Transform from point correspondences

I am trying to find a way to get the Geo Transformation (NW corner position, pixel size and rotation) for a given tiff image. I have a tiff which I know is using some coordinate reference system (an ...
0
votes
0answers
39 views

Properties of Spatial Reference

I have a layer in ArcMap. I want to get all spatial reference properties of that layer. How the properties can be accessed through ArcObjects? I am using .Net technologies.
2
votes
1answer
100 views

HDF5 and georeferencing?

I'm doing quite heavy processing of Earth Observation data, and it appears that a lot of my workflow can be speeded up by using HDF5 for local storage. I mostly work with large stacks of raster files, ...
0
votes
2answers
54 views

creating a right angled rectangle on google maps from a line

I have an application where the user draws a line, then automatically the software should create a rectangle where the line intersects the midpoint of two adjacent sides of a right angled rectangle. ...
6
votes
1answer
162 views

Displaying data from two UTM zones on one map?

With at least some USGS quad maps, maps that overlap into adjacent UTM zones continue to use the same false easting (rather than start at zero in the middle of the map). Is this a required standard ...
3
votes
2answers
474 views

What coordinate NOTATION would this be?

0558253.7 13083091W The data came in a csv file which was then converted to an xlsx file in Excel. No mention of original coordinate system, and the fields were just named - "LATITUDE" and ...
4
votes
1answer
105 views

Explaining gap between Robinson WGS84 (EPSG 54030) in QGIS and ArcMap?

Does anybody know why there a gap appearing between two point layers create with ESRI and QGIS when I a reproject, from the same source file, to Robinson ? The source coordinate system and ...
0
votes
0answers
19 views

Creating regions (set of lat, lng) on map using other than ArcMap?

I'm writing a project for school and as a part of the project I need to tell if a certain point is within a given region (which is a polygon made of lat, lng tuples). So far I was working with ...
1
vote
0answers
24 views

Text box with automated coordinate reference system in use on Qgis

Using an expression, is it possible to automatically fill a text box placed on the map (in the composer) showing the reference coordinate system of the project? If possible, how would that expression ...