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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0answers
59 views

Disparity between QGIS and ArcGIS for Desktop georeference results?

I am georeferencing a static map in JPEG format. I would prefer to use QGIS for a variety of reasons. I've never georeferenced with QGIS before, so I may not have the process quite right. I ...
4
votes
1answer
104 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 ...
4
votes
1answer
67 views

What projection should I georeference this historical map to?

I'm using ArcGIS. I have a historical map from 1884. It has bathymetry information which I would like to compare to modern bathymetry models with as much accuracy as possible. I don't know what ...
0
votes
0answers
20 views

ArcMap - UK - Ordance Survey Map Misalignment

I'm trying to load an Ordnance Survey Great Britain 1:50000 basemap that I downloaded. It should be centred over north-east Scotland, but is showing as somewhere near Nigeria (Africa). I've tried ...
0
votes
1answer
52 views

Point feature class from xy coordinates cannot be related to project in ArcGIS

Once created the point feature class from XY coordinates I imported from an excel table (e.g. X: -4,415622; Y: 36,733385 using ArcCatalog), I am able to zoom to the layer, but I am not able to relate ...
2
votes
1answer
119 views

String of coordinates into Openlayers-3 Linestring on Vector Layer

I getting a string of coordinates like so: [[38.313072, -89.863845] ,[38.312675, -89.863586] ,[38.310405, -89.862091] ,[38.310405, -89.862091] ,[38.309913, -89.861976] ,[38.309768, -89.861976] ...
-1
votes
1answer
62 views

Points don't show up on an overlaying shapefile?

library(ggmap) library(rgdal) cities<-c("city A","city B") country<-readOGR(dsn=".",layer="country") gc<-geocode(cities,source="google") gc$names<-c("city A","city B") ...
2
votes
1answer
103 views

Adding OpenLayers basemap to a QGIS project changes the CRS to WGS 84 / Pseudo Mercator

I have a QGIS (2.10.1) project that contains several shapefiles, all of which are EPSG:3338 (NAD83 / Alaska Albers). The project property CRS is also EPSG:3338. All of the shapefiles display ...
1
vote
1answer
513 views

Calculating distance between two points on map using ITM coordinates?

How to calculate the distance between two point on the map using ITM coords? i have a map with items on it all with ITM coords and i need to return all items in X meters of radius from my location. ...
2
votes
1answer
396 views

Does Coordinate System of ArcMap data frame have to match at least one of its layers?

Does the Coordinate system of a data frame in ArcMap have to match the coordinate system of at least one of the layers in the table of contents? I have found that if defined it will take on the ...
1
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0answers
30 views

Easy Custom Labelling and CRS Issues

I'm having several issues with a vector layer in a project I have been working on for the last week. None of the overall settings have been changed but it appears that there is an issue with the CRS ...
2
votes
2answers
630 views

Setting custom spatial reference/coordinate system to shapefile using ArcPy?

I have a python code which converts JSON text file to a shapefile. I have to set coordinate system to this shapefile created. I do not want to access the .prj file from my computer as this code will ...
1
vote
0answers
19 views

Updated GPS coordinate shows rotated point

So I have a GPS coordinate: 8.6258,47.3325 Which I use as my origin. Then I have the path of an object that has been moving around based on the ENU position, say: -10, 12 //east, north in meters ...
2
votes
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 ...
0
votes
1answer
101 views

Converting coordinates into decimal using SQL Server Spatial?

I am looking to convert a pair of coordinates to decimal, and am unsure how to go about doing it. The following script select Centroid.STY as Longitude, Centroid.STX as Latidude from ( select ...
5
votes
2answers
83 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({ ...
3
votes
4answers
287 views

How to measure without coordinates?

My current Project is to "map" a turntable in qgis. I know, very unlikely but that's what my teacher wants. My teacher also wants me to measure something in this project (Very specific, isn't it?). ...
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 ...
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 ...
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? ...
4
votes
0answers
316 views

Can GeoTools parse GML CRS definitions?

A kind of branching of this question. Soon I will need to handle GML Coordinate Reference Sysyem definitions in a Java servlet. Links: GML OGC reference. Concrete example. I know that GeoTools ...
32
votes
2answers
2k views

What coordinate system should be used to store geography data for celestial coordinates?

I am doing an astronomy project. I want to have the information about our images stored in a spatially enabled database. This, I would think, should be a very easy special case for GIS functions ...
15
votes
2answers
704 views

Geotransformation for polar stereographic?

I'm currently working to import CANGRID climate data (provided as Surfer Grid ascii, ".grd" files) into ArcGIS. The grid is 95 rows by 125 columns in size.Metadata provides lat/lon of origin (lower ...
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 ...
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: ...
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 ...
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: ...
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 ?
19
votes
8answers
15k views

ArcCatalog complains that spatial references don't match between a feature dataset and a feature class that have the same coordinate system?

I have a feature dataset that is using the GCS_WGS_1984 as the geographic coordinate system. It includes a few feature classes. This feature dataset is itself in a file geodatabase that contains a ...
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
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 ...
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
0answers
76 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 ...
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
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: ...
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 ...
1
vote
1answer
295 views

ArcGIS feature class interprets Latitude/Longitude in meters instead of degress

I wanted to tie toegther some data from my database table to an ArcGis map. The table contained an Object_Id, GIS_LATITUDE and GIS_LONGITUDE column. I added the feature layer based on the table (x as ...
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
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. ...
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 ...
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> ...
1
vote
1answer
51 views

voronoi / thiessen different CRS

I am having problems with thw 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 ...
2
votes
1answer
41 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 ...
9
votes
3answers
13k views

Understanding Coordinate System Transformation in ArcMap?

For the Data Frame Properties on a map in ArcMap, what is the difference between selecting a new coordinate system and using a Transformation?