A data capture method including: a) mounting a rangefinder module to a portable device, the rangefinder module including a laser rangefinder emitting and detecting a rangefinder beam, the laser rangefinder being aligned along a rangefinder direction; wherein the portable device includes a camera and a display, the camera has an optical axis, and the rangefinder module or the portable device includes a positioning system (10, 20) and one or more orientation sensors (11, 20), wherein, in a mounted state, the laser rangefinder and camera are in fixed relation to each other with the rangefinder direction and optical axis substantially aligned; wherein the method further comprises the steps of: b) performing an alignment including determining the laser rangefinder direction by: i. capturing one or more alignment images using the camera; ii. determining from the image or images a position of the rangefinder beam in the image or images; and iii. determining from the position the laser rangefinder direction relative to the camera; and c) capturing data by: i. displaying an image from the camera on the display with a marker, the marker and the determined laser rangefinder direction being aligned such that the apparatus is arranged to be pointed by a user towards a target by aligning the marker with the target; and ii. capturing substantially simultaneously an image including the target using the camera and a range to the target using the laser rangefinder; and iii. capturing a position of the rangefinder module or portable device using the positioning system and an orientation of the rangefinder module or portable device using the orientation sensors substantially simultaneously with capture of the image and range. a) mounting a rangefinder module to a portable device, the rangefinder module including a laser rangefinder emitting and detecting a rangefinder beam, the laser rangefinder being aligned along a rangefinder direction; wherein the portable device includes a camera and a display, the camera has an optical axis, and the rangefinder module or the portable device includes a positioning system (10, 20) and one or more orientation sensors (11, 20), wherein, in a mounted state, the laser rangefinder and camera are in fixed relation to each other with the rangefinder direction and optical axis substantially aligned; wherein the method further comprises the steps of: b) performing an alignment including determining the laser rangefinder direction by: i. capturing one or more alignment images using the camera; ii. determining from the image or images a position of the rangefinder beam in the image or images; and iii. determining from the position the laser rangefinder direction relative to the camera; and c) capturing data by: i. displaying an image from the camera on the display with a marker, the marker and the determined laser rangefinder direction being aligned such that the apparatus is arranged to be pointed by a user towards a target by aligning the marker with the target; and ii. capturing substantially simultaneously an image including the target using the camera and a range to the target using the laser rangefinder; and iii. capturing a position of the rangefinder module or portable device using the positioning system and an orientation of the rangefinder module or portable device using the orientation sensors substantially simultaneously with capture of the image and range. b) performing an alignment including determining the laser rangefinder direction by: i. capturing one or more alignment images using the camera; ii. determining from the image or images a position of the rangefinder beam in the image or images; and iii. determining from the position the laser rangefinder direction relative to the camera; and i. capturing one or more alignment images using the camera; ii. determining from the image or images a position of the rangefinder beam in the image or images; and iii. determining from the position the laser rangefinder direction relative to the camera; and c) capturing data by: i. displaying an image from the camera on the display with a marker, the marker and the determined laser rangefinder direction being aligned such that the apparatus is arranged to be pointed by a user towards a target by aligning the marker with the target; and ii. capturing substantially simultaneously an image including the target using the camera and a range to the target using the laser rangefinder; and iii. capturing a position of the rangefinder module or portable device using the positioning system and an orientation of the rangefinder module or portable device using the orientation sensors substantially simultaneously with capture of the image and range. i. displaying an image from the camera on the display with a marker, the marker and the determined laser rangefinder direction being aligned such that the apparatus is arranged to be pointed by a user towards a target by aligning the marker with the target; and ii. capturing substantially simultaneously an image including the target using the camera and a range to the target using the laser rangefinder; and iii. capturing a position of the rangefinder module or portable device using the positioning system and an orientation of the rangefinder module or portable device using the orientation sensors substantially simultaneously with capture of the image and range.